rear ends

[tomh115]

what types of rear ends are you guys running in your classic trifives?

[NickP]

what types of rear ends are you guys running in your classic trifives?

Custom length 9" Ford, 35 Spline, Locker. All Mark Williams Parts.

[ETriggs]

Stock with 3.36 gears. :D

[MikeKy55]

Actually a 64 housing that I removed the coil spring mounts and added perches. Has a 63 3.08 posi chunk. This gave me self adjusters at the same time. Reason for this setup is I didn't plan plan to be hammering it often and the 64 rear was free.

[Randy 57]

Hey you left off 12 bolt, guess my other vote will cover that:D

[the4x4pig]

Stock with a 3.73 posi now but just picked up my housing that I had narrowed. Soon I will have a 54" ford 9" with 31 spline dutchman axles, 4.10 gears and a posi.

[Tom$lick]

I have a 9in... it just came that way. :)

When I got the car it was already installed, not sure exactly what gears it has or if it´s posi or not. The car´s in the shop at the moment getting a heart transplant and a tranny refresh.

[Chevynut]

Narrowed Dana Super 44 from a ZR-1 Corvette.

[Sweden]

Custom length 9" Ford, 31 Spline, Dutchman axels 4.10 gears and a posi.

All from Jim Meyer Racing.

[dseale4888]

Stock open diff.
Dave

[Rick_L]

9" Ford from a Lincoln Versailles. 58-1/2" wide wheel to wheel. Works great with pocket kit, mini tubs, 8" wheels w/ 4.75 b/s and 275 tires.

[Shua57]

Stock with 3.73. Will leave it in till I do a LSX block install, then something custom I think.

[WesTek]

Hey, It only lets you vote once.

55 Ford 9" 4.10
55 GM 12 bolt 4.11
57 stock 4.11

[Ontario55]

Ford 9"
Strange axles
4:11 gears

[4-SPEED]

Stock with 488 - 411 - 336 & 308. I buy every spare axel "driver side" I can. Never broke a posi only axles, 1.5 hrs to swap the gears. ;)

Dennis

[a55togo]

stock housing with a 336 single leg for now also have a 411 posi 370 open 355 open and a 308 open. I like to play with different ratios and it is simple r&r.
:D

[Ratpackin]

Mopar 8 3/4 4:10 -was on the car when I bought it in '78, held up to big blocks all these years- never a complaint.

[Diognes56]

Stock rearend for now. Currently looking at options though.

David

[squeaks55]

57 chevy stock rear, with posi center and 355 gearset.

[walrus]

Stock with 3.7 gears coupled to a 700R4 overdrive trans,,,,,,

[edawg55nomad]

Stock.....but it just crapped out on me so I'm looking to upgrade.

[JWB]

Mine had a shortened ford 9" in it when I bought the car...

[ccdred57]

stock rear end with Richmond 4:11 and Detroit ez locker

[deadcarny]

I'm keeping mine allll Chevy....lol

I used an S-10 4.11 rearend assembly from a '99 2 wheel drive truck. The spring perches are in the exact location needed if you install the spring pocket kit and the width is narrow enough to give ya that deep dished rear wheel look i wanted. I added a girdle plate to take the subtle pounding I plan to give it...!!! These rearends are exactly the same as the last gen Camaro with the housing shortened to fit the trucks narrower width, all internals are interchangeable. I did, however, replace the factory posi with an auburn unit. Most Camaro enthusiasts claim they are good to 400 hp with the girdle plate added. I think if you plan to be at the drag strip every weekend, and you are 400+ hp, the proven Ford 9 incher is the way to go.

[brw]

so an s-10 rear will work iff i cut and move the perches??

[avmechanic]

Chevelle 12 bolt with brackets cut off 3:55 gears eaton posi. I am not sure if it is the early 64' to 67' one or the 1" wider 67' to 72' one as I haven't had the chance to check. I beleive they are 57 1/2" and 58 1/2" respectively. Seems to work well though.

Greg

[Dearl]

IM USING A GM 10 BOLT OUT OF A 1978 TRANS AM, HAS 3.08 W/POSI. HAD TO CUT OFF THE STOCK BULKY MOUNT AND BOUGHT SOME STOCK PERCHES AND WELDED THEM IN AFTER LINING EVERYTHING UP.

[Rick_L]

I think you're off on the Chevelle rear end widths. I believe the early ones are around 60" and the later ones an inch or so wider as you say. Stock 55-57 axles are 60-1/4". The only 12 bolt rears in the 57-58" range are from the 66-67 Novas and are quite rare. 1st gen Camaro and 2nd gen Nova axles are also 60" wide.

Myself, I think if you have an original 67-72 Chevelle, 67-69 Camaro, or 66-72 Nova 12 bolt, you are better off selling that to somebody that has one of these cars that's restoring it. They go for big $$, especially the Nova axles. Then you have the $$ to get something else that works well, maybe better.

[Tenn210]

I just installed a '97 exploder 8.8 rear.

373
31 spline moser axles
ford 9" ends
disc brakes

More info: http://www.trifive.com/forums/showthread.php?t=7483

[1956 utility futility]

Stock 57 10-bolt w/aftermarket posi unit, 3.70 gears, and Moser axles. Rearend was narrowed 6" for use with spring pocket kit.

[Black 55]

Narrowered Ford 9" strange pumkin, and 31 spline axles 411 gears with detroit locker.

[kzo57]

After blowing up a 410 and 456 I went to a 488 with Dutchman axles. I still have that 57 rear. But put in a 9" when I went with the BBC, 31 spline axles from Moser, with a Locker. Its been in since 94 and never had a problem.

[Dearl]

I HAVE AN 8.5 10 BOLT THAT CAME OUT OF A 1978 TRANS AM. ITS A POSI WITH 3.08 GEARS. I CUT OFF THE STOCK LEAF PERCHES AND WELDED ON AN AFTERMARKET SET. THE LEAF SPRINGS ARE IN THE STOCK POSITION. IT PUSHED THE TIRES OUT ABOUT 1/2 INCH ON EACH SIDE. WORKS GREAT,GOOD ROAD GEAR.

[HT_Sam]

Back in the early 70's I put a 56 Olds in my 57 SC.

[mike56]

What am I running in my trifive ?, may not fit my situation. My '56 has a '76 camaro 10 bolt rear installed. Man i wish it was running. mike

[Ol Boy]

I have a 12 bolt from a 65 chevy II. It has a moser lightwt spool and 35 pline axels, 4.10 gear at the moment, It is 54 inchs axel to axel. I am using the spring perch kit so I has to move the leaf perches over about 1 1/2inch. I wish i had the factory guts, it would probably end up on ebay. If I break it, I am going with a Dana 60.

[Belairmark]

Bog standard '55!!

Bust the gears last year, so may upgrade next!

[PaPa Mike]

Stock with 3:55 posi.

[rmk]

12 bolt with 3:90's. might be changing to 3:55's for a better crusin' gear.

i think a more interesting poll would be which gears you run. or has this been polled before.

[airmentbob]

got the stock 3.70 for now, but have a dana 60 3.73's waiting in the wing whenever i get the motivation, but i might buy some 3.55's for freeway cruising.

[Bigmark56]

56in wide 9in strange alum center 370 gear detroit locker 35 spline moser axels

[rusty55chev]

i know its a little late but we used a 67' chevyII nova rearend because its factory narrowed.

[henrys57wagon]

70 Nova 8.5 with 273's open carrier, will be installing a posi 342 this winter. Good day, Henry.

[supersix]

Stock '56 3rd member in my '57 w/3.70 gears and an added Eaton posi.

[kychevy55]

Hey guys..i've got so many differnet answers here locally so i'd thought i ask all of you guys(and girls)..my 55 has a late 60's or early 70's chevelle rear end with 4:56 gears....i've been told that a early 70's nova would fit right in with no drive shaft modifications..i've also heard that a late 70's trans am would also work with some mods to it. I want to run some highway gears probably around 3:42 or even a 3:08...I'm running a 383 stroker but wanting a daily driver not a drag race car....I'd love to find something to fit right in with posi trac and some stock highway gears....please help

[lonewolf85]

Stock 370 open saginaw close ratio 4 speed

[jeffs55]

10 bolt peg-leg with 4:something gears. (haven't opened it up to see exactly yet)
On my way home from buying the car the rear U-joint let go.
I had no Idea what rear it was. I took the whole drive shaft to a A/P store and the guy was kind enough to match up the joint for me.
The winning match was an early/mid 70s Monte Carlo.
PO installed with inboard springs.

[57boxman]

I had the stock 57 rear until I tore it up. The spider gears broke breaking the ring gear in the process. I still have the carcass.

Due to the cost factor I replaced the broken original differential with a 10 bolt out of a 92 Blazer. Non posi 7 5/8".

Best thing I could say it is the correct width. The worst is that I had to have a new drive shaft made.

[sap6302007]

I must have some odd ball others - a 1960 31 spline Olds rear in a 56 and a 12 bolt in a 57.

[Russell@NerdRods]

Corvette Dana 36 Stock Width
3.73 Gears
Carbon Fiber Clutch Pack

(I'm going to try to break it)

[stillz 55]

Mine is stock with 355 gears.Going to go with an 8.8 big tube ford soon.Im really suprised these rear ends haven't caught on with rodders yet.They are cheap,salvage yards are full of them,easy to build,and they are a very tough unit,even stock.12 bolts and 9inch rear ends are great,but they are getting tougher to come by since they quit making them late 80s early 90's

[Bowtie55]

Custom length 9" Ford, 35 Spline, Locker 4.10 gears. Currier

[keith]

Just found a complete torino 9" down at the classic car junkyard, going to pick it up on sat. 59.25 wide, flat top tubes, posi with 3.00 gears. $300 and it's mine. They have a bunch of ford 9" so I'll eyeball them all and make a decision.

[grandmas55]

I have a stock housing, and had a 3.08 third member out of a '63 Nova with the TH350 which worked great, but when I installed the TH2004R the 3.08 was too tall. I reinstalled the 3.55 stock Powerglide third member which works well with the 200 trans. In my '55 Bel Air I had a '69 GTO 3.70 posi with a Muncie 4-speed. I used a Chevy-to-Pontiac u-joint.

[ETriggs]

I found a link for all of you 9" Ford guys and those looking for one. This has alot of info.

http://www.kevinstang.com/Ninecase.htm

[Stingxray]

Good day Gentleman: I'm a New member to this site. Thought I would chime in here. 12 bolt, welded tubes, 50" wide, 4 link, Henry's axles with coilovers & 3.73 .

http://inlinethumb40.webshots.com/33575/1277737351014147512S600x600Q85.jpg (http://rides.webshots.com/photo/1277737351014147512CSSMBG)

[ETriggs]

That is sexy!!

[MileHiSS]

Currie 9" ford Posi., Billet case with Willwood discs / time flies when you're having fun

http://pic20.picturetrail.com/VOL97/466970/583315/8873509.jpg

[4xlr8n]

currie 9, 4:11,

[getrich55]

Stock 10" posi 373......Going to narrow up this winter and go with deeper dish rims........YES!!!!!!:D

[GUNNER-RV]

1965 CHEVELLE 12 BOLT WITH 7 INCH CRAGARS AND 275/60/15. EVERYTHING IS STOCK LOCATION .

http://pic18.picturetrail.com/VOL906/4314711/14784014/294440684.jpg

[squeaks55]

GUNNER-RV,

Do those 275's rub at all? What is the back space of the 7" rims you are using? The 12 bolt is that a 60" rear?

I currently have a 57 chevy rear in my 55. I had tried to put on a 275/60/15 tire on a 15 x 8 Cragar and they hit the lip of quarter. I had to mount 255/60/15 on th 8" cragars.

I have 15 x 7 cragars on the front of my car and was wondering if they would work on the rear with a 275 tire.

Any info you could offer would be greatly appreciated. Thanks.

[Chevynut]

I currently have a 57 chevy rear in my 55. I had tried to put on a 275/60/15 tire on a 15 x 8 Cragar and they hit the lip of quarter. I had to mount 255/60/15 on th 8" cragars.

I have 15 x 7 cragars on the front of my car and was wondering if they would work on the rear with a 275 tire.

Any info you could offer would be greatly appreciated. Thanks.

any wheel you put on the rear with a stock rearend should have ZERO offset to center it between the spring and fenderwell lip. The fenderwell lips are abourt 72" wide, and the springs are 48" wide outside. That makes them 12" wide. So the centers of the wheelwells are at 60" wide.....almost exactly the same as the stock rearend.

An 8" wheel with zero offset has 4.5" backspacing. A 7" wheel with zero offset has a 4" backspacing. Use one of those and the 275's should fit.

[pmbinc7618]

Hi All and Happy New Year!

Car: '56 210 2 dr. hardtop sport coupe.
Rear end is a Strange Eng. Dana -60 with 35 spline axles, 3.50 posi. made to order for tri-5 with spring perches in the stock position. I'm running 255-55-17 BFG's on AR TT-2's with 4.5 inch backspace.


pete

[jrhodus]

All stock with 3.55's but looking for some 3.08's......time will tell.:D

[Ronny's 55]

My best friend that has passed now built me a 9" it's 59 1/2" flange to flange. He started with a hotrod center section and cut the tubes from new. We ordered 31 spline ax. from Moser it's a posi with a 325 gear. He also put a backbrace on the housing. It's overkill for my mild sb. but if I ever get to go bb. I'll have the drivetrain it also has a 400 turbo. It's nice not having to worry about breaking spider gears or 17 spline axs. http://www.picturetrail.com/ronnystoess

[reborn55]

Original 3:70, with spare 3:08, 3:36, and 3:55 sitting on the garage floor in the corner.:D

[Ron Holz]

My 56 has a stock 3.70 rear end, but I want to change it,just not sure to what yet ?
Ron

[brw]

i got a 8.5 today and was wandering if anyone would know if it will fit my 55 it is 54inches from backing plate 2 backing plate??? my car is in storage so i cant messure until weekend??thanks:confused:

[BatterdBull]

Stock, 3:73, Posi

Don

[Buggrn56]

Bought my 56 with stock GM 3.36 gears, am taking them out and replacing them with 3.08. Got a great deal from a local guy cleaning out his garage. He had the 3rd member as well as two sets on front bearing, one set of rear axle bearings and a bunch of seals. He let me have it all for $100! I couldn't get the money out fast enough. :D

Rog

[ETriggs]

GEEZ!!! Why can't I find a deal like that??? I just spent $108 on the rear axle bearings!

[carls 56]

i have to loose alittle weight in it and then i wont look to bad in shorts.;)

[BLK55HT]

I am running stock with 4.10 gears and Dutchman axels. Trans is a 700R4.

[Abram1957]

Ford 9'' locker 31 spline stock witdth big drums.
15x 10'' wheels 11'' wide tires

[Blt2Lst]

Stock rear with 3.36.
Found a third member with 4.11 and open diff for $100.
Planning to install this weekend, should wake up this sleeper.

:tu:tu

[56sedandelivery]

57' Olds. Not in the car yet; plan on moving the springs inboard of the frame rails. Not narrowed, but have to shorten the Strange axles 1" each to fit the housing width. Have 2 3rd members, both posi, one with 4.88 the other with 5.38. Maybe I'll use a 3.64 or 3.90 gearset. Originally bought the complete rear end at a second hand store for $15.00, and they "tried" telling me it was out of a Ford P.U. truck; I figure it was dropped off in the back of a Ford truck. I have 2 sets of 29 spline 57'-58' axles if anyone is interested,one has NEW bearings, and they're free to whoever will pay the shipping.

[jeffs55]

Mopar 8 3/4 4:10 -was on the car when I bought it in '78, held up to big blocks all these years- never a complaint.

Hey Ratpakin, You seem to be the only one with a MOPAR axle.
I may be using one soon. Got any pics?
The '86 S10 rear I have now just ain't gonna cut it.

[56belairconvert]

I guess they forgot about a 12 bolt posi's. I have one out of a 1965 chevelle. Cut off coil spring perches and welded on moroso leaf spring mounts. I have 3.31 gears and a doug nash 5 speed, 225 60/r16 tires on 7" torque thrust II's

[alive 55]

i just put in a 3.55 10 bolt out of a 68 camaro

[alive 55]

corection.....someone came by the shop seen me workin on my 55 and wanted my rear he traded me a 67 chevelle 10 bolt with moroso 3:73s and a rear end gurdle and $300 for my camaro 10 bolt with 3:55s....he didnt want the loops on the top,i told him id cut them off and weld the perches on for him i told him it would be fine he didnt belive me. so now i got the gears i wanted .....should run like a raped ape with my 383 stroker and 700r4.

PS. the shop is my friends PORKY'S SPEED SHOP ROUTE 34 & ROUTE 537 COLTS NECK N.J 15 min. from raceway park englishtown

[Texas55]

12 posi with 3.55 bolt out of 69 Chevelle. Installing rear discs pushed my wheels out too far. I am now getting it narrowed to 60" from wheel mount to wheel mount (outside rotor to outside rotor) and installing 3.73.

[chevender]

A Chevelle 10 bolt for a Camaro 10 bolt and 300 bucks? What a deal!!
Rick

[Robb]

Stock with 4.11 gear (open)

[56onAir]

01 2wd blazer rear, (54.5" wide) rebuilt with eaton posi, 3:73 richmond gears and 30 spline moser axles. Speedway disc brake kit with gm metric calipers.

[gss1955]

Orginal rear, 3.55 gears, CCP disk brakes.

[Cougs57]

Original 3.36 10 bolt.

[tensecsprint]

57 pontiac rear end, 5:13 gears latter bars and a posi, should have chassis together in couple of weeks will post pics

[2dblnikels]

'69 camaro 12 bolt-4:10-posi in the 2dr,and 68 camaro 12 bolt-3:07-posi in the 4 door,yahoo its great to see the variety of drivetrains in everyones cool machines.the story behind the 69 was a friend and me stopped at a scrap yard that was closing down 1 hr. east of town,we were looking at engines,when I looked down along the fence and saw a pile of truck diffs,so I went over and in the middle of the truck diffs(WOW a car 12 bolt)I couldnt believe my eyes(there was hardly anything left in this yard)the posi tag was still there,the numbers showed '69 camaro,I talked to the owner and got it for $200.they'r still out there resting.your friend in the fives.

[MikeB]

10-bolt with 7.5" ring gear from a 79 Malibu was in the car when I got it in 2003. GM used these only on V-6 cars, until they went to a 7.625" with a larger rear pinion bearing and more axle splines (28?). Neither one would have been on my junkyard shopping list.

A few years ago I replaced the 2.73 gears with 3.42 gears from Randy's R&P, and added a cast aluminum rear cover with bolts that tighten up against the bearing caps. So far, so good behind the torque of my old 350 and my new 327. Trans is a M20 Muncie with 2.52 low gear, so torque multiplication to the rearend isn't all that great.

Axle flange to axle flange is around 1.5" less than stock, which caused my rear 235 tires to rub the leaf springs. I just recently switched to 225.

Some day I will spring for a fairly basic 9" with 31-spline axles, 3.25 gears, posi, and disc brakes.

[jeffs55]

Had an S10, thought I was going to use an 8 3/4, then thought I'd up grade the S10, ended up getting a 9 inch.:rolleyes:

[thook]

im running stock rear, with airplane gears:p lol there 3.0 somethings

[gconnsr]

I'm sticking with my stock 3:70 rear, I took it apart and it looks like new inside. I have a new Auburn Pro posi for it and I'm replacing all the bearings, I may go with better axles down the road.

[57guy]

Currently have the stock 3.55 open carrier rear end installed. Have a F**d 9" waiting to go in with 3.90 gears, a Detroit Locker carrier, 31 spline Strange axles, and disc brakes. I figure that'll take the abuse the LS2 I'm installing will give it. Was afraid I'd snap the factory rear end before I got to the end of the street! If any ones interested, I'll be selling the factory rear end when the F**d goes in....

Kevin

[Rebel Bill]

I am planing on a 8.8 ford rear end from a 98 explorer

[55Lucile]

85 corvette rear with 3.08, nice highway gear

See pics in my garage;)

[tikitrash]

My 56 suprised me with an S10 rear end, havent figured out the ratio yet...

[Sweden]

I bought a shorten F**D 9 inch from a company called Diffworks in Corona CA, really great guys to do business with. :tu

[Ermann]

Hi,

I'm talking from Europe.
I have one 1957 chevy sedan. I just broke the original rear end with a little crash.
I found one 1960 chevrolet impala rear end in very good shape.
Can I use this one on my '57 chevy?

thanks
Ermann

[4drpartsman]

I'm not sure that I can give a "quick responce", but here is MY reply! A 1957 Pontiac Rear-End! My car is still a "roller!" I hope to have an engine/tranny combo, "fired-up", before the snow flies! I remember reading "set-up" tips from a drag racer, in a car magazine, "years ago!" He said; "Fifteen by Eight Stock Steel Wheels that do nothing else but weigh, 14lbs." -or whatever it was, ha!- I found out real quick "why!" The Buick, Olds, and Pontiac units were "massive!" They also have the same leaf spring "perch" location! I had a 4.10 gear installed, then raised the bar again, by having a set of 'Vette Disc Brakes installed! No wonder I'm still "rolling" it around! I did transplant a 12-Bolt, in my first 4drwgn! I had destroyed the O.E.M. unit, trying to race like that "un-named" drag racer did! The 12-bolt had been "re-geared" too! I'm not sure if it was a driveline/pinion angle problem, or that the gear "set-up" was "off", but I did have a problem w/noise. Thanks for askin' -ha!

[Jims56]

GM 12 bolt 4.10 one legger 275 x 60 x 15 on 7'" 3 3/4" BS.Will change when i mini tub.

[gconnsr]

Just got my bearings pressed on the Auburn posi for my stock rear with 3:70s today.:tu I knew there was a reason I came to the thread, I got slightly distracted a couple posts back.:D

[red&white?]

Mopar 8 3/4 4:10 -was on the car when I bought it in '78, held up to big blocks all these years- never a complaint.

heard this was the hot set up back in the day!! also the MOPAR 4-speed !! is this true or rumors????:tu

[Rick_L]

Well the Mopar 8-3/4" is better than the stocker, but probably not as good as a 12 bolt, 8.5" 10 bolt, or Ford 9". Even back in the old days, you wanted the big pinion gear set and case (1-7/8" pinion), and they were not as easy to find.

The Mopar transmission is stronger than a Muncie, but it's also a whole bunch heavier, gear ratio selection is limited, and it's a PITA to put one in a Chevy.

Try to find either one today at a reasonable price. They belong in the cars they came in these days - those high $$ Cudas, Challengers, Road Runners, etc. Worth more to those guys than to use in a non-stock application.

[Gary Blake]

12 bolt posi out of a comaro

[darkfox1]

stocker, literally.. I dont think its ever been serviced.

[Bupp56]

My 56 has a GM 10 bolt out of a 79 Camaro. Cut the Camaro spring perches out and welded tri five perches in.

[enigma57]

Presently running a stock '57 Chevy rear. But will be installing a '57 Pontiac housing with 9-1/4" 4.56 posi 3rd member from a '57 - '64 Olds and Olds 31-spline axles. Currently debating whether to adapt disc brakes to this rearend or to locate 11" backing plates and wide rear drums from a '62 - '64 Olds station wagon.

Happy Motoring,

Harry

[MikeKy55]

Hello Harry! Long time no see. Have a great holiday season.

[reborn55]

Harry--how have you been? Hope you have had a great year.

[1-bad-57]

Ford 9 " track-lock with 3.25 gears. Wonderful for cruising.:D

[brw]

wonder what gear my 55 has it has stock rear came with 6cyl 3spd bel air hrdtp???i know its posi most of the time????

[57chevyman]

Stock with 4:11 "P" case

[brw]

Stock with 4:11 "P" case

yours or mine???

[socal57chevy]

wonder what gear my 55 has it has stock rear came with 6cyl 3spd bel air hrdtp???i know its posi most of the time????
bump.

With a floor jack and chalk, you can calculate it in the driveway.

Jack and support the car.
Mark the driveshaft yoke position relative the carrier housing. (draw a line across both)
For positraction rotate the rear tires one full revolution while counting the revolutions of the driveshaft. The number of driveshaft revolutions is your gear ratio. If it rotates 3 and 1/2 times this means it's a 3.50:1 so on and so forth.
For standard open differential, lock one wheel and rotate the free wheel two revolutions while counting the driveshaft revolutions.

If you want to be 100% certain of the precise ratio, counting the teeth on the ring and pinion or looking up the axle code will do it. Be warned that lots of people swap gearsets in the carrier, so the code may not be correct for your ratio anymore.

Hope this helps...

I recently swapped in a 10 bolt from a 4wd S-10 pickup. I welded the axle tubes to the center section and plan on a girdle with axle braces before the end of the year.

[BigDaddyRat]

Stock 12 bolt w/4 Link, 4:11 Posi...

[boobies 57]

im gonna run a rear end off a '67 nova with a 4 link from tci.

[enigma57]

Presently running a stock '57 Chevy rear. But will be installing a '57 Pontiac housing with 9-1/4" 4.56 posi 3rd member from a '57 - '64 Olds and Olds 31-spline axles. Currently debating whether to adapt disc brakes to this rearend or to locate 11" backing plates and wide rear drums from a '62 - '64 Olds station wagon.

Happy Motoring,

Harry

Hello Harry! Long time no see. Have a great holiday season.

Harry--how have you been? Hope you have had a great year.

:D Mike!...... Ken!...... Howdy! And thanks for your kind words and well wishes. Sorry it took me so long to respond...... I haven't revisited this thread for a while now.

Regarding rear ends I have installed in these cars in the past......

Over the years, I have installed a '57 Cadillac rear, an 8-3/4" MOPAR rear out of a '60 Plymouth cop car, a couple of 9" Ford rears with 31-spline axles and a 12-bolt posi rear from a '69 SS 396 Camaro. All these rear ends were installed behind 'built' small block and big block engines with stick shift trannys and I drove them pretty hard in those days. Never had a problem with any of them. All performed very well and none broke.

Regarding the '57 Pontiac housing and Olds posi 3rd member and axles I have stored here...... Its plenty stout. But my T-56 tranny has a very low first gear. With the low end torque my engine should make once I have it together...... The 4.56 gears will be pretty steep for road use even though she will cruise at 2,550 RPMs at 70 MPH in 6th gear overdrive.

I also have a set of used 4.09 gears for the '57 - '64 Olds / Pontiac rear. But past experience indicates a lower (numerical) highway gear may be the way to go. So I may install a 3-series carrier and re-gear it. Or I may sell it and drop in a Dana 60 with thickwall axle tubes welded to the carrier. When it comes to strength over weight, I'll take strength any day. ;)

Happy Motoring,

Harry

[enigma57]

wonder what gear my 55 has it has stock rear came with 6cyl 3spd bel air hrdtp???i know its posi most of the time????

:) From memory, the stock '55 rear with 3-speed manual tranny should be a 3.7 ratio if no overdrive, brw. But 3-speed OD trannys were backed up by 4.11 gears in these cars.

As noted by socal57, the best way is to verify differential ratio to be sure. Many of these cars were re-geared over the years. In the late '60s and early '70s, highway gears allowing higher road speeds and lower fuel consumption became popular with those using these cars as daily drivers. And on the other end of the spectrum, racers often installed higher (numerical) gearing that allowed faster acceleration, but wasn't optimal on the road for a daily driver.

Another way you can check if you have a tachometer (and your speedometer is accurate) is to make a note of RPMs in high gear at cruising speed and plug it in to a computer program such as the one on the Richmond Gear web site......

http://www.richmondgear.com/streetcalculators.html

Hope this helps,

Harry

[Rebstew]

Stock rearend with something close to a 373 rear gear. I just squeezed on a set of Firestone Gun Dipped Cheaters on 7" rims to fit under the car with less than an inch from the inner fender well lip and the same to the factory placed springs. I'd like to find another rearend with the same width and use these wheels. Is there a stock rearend the same width? It has to be a perfect swap or I'm going to have to redo my rims. Tire are 9 1/2 inch wide and 30 inches tall.
http://i624.photobucket.com/albums/tt325/ScroungersCC/001-13.jpg

[GW56]

I am running a ford 9" from a lincoln versalli with turbo 400 trans
the gears - i am about to change not sure 3:70, 3:90, or 4:11??
any input guys?

Currently i have 273 peg leg. Rims american racing 17"not sure of the width or backset.
Tires nitto 255/40/17

I need help picking the right gear. I do close to no freeway miles and just want to feel the power for all the cash i have invested.

468 cid
800 holley dbl pumper
roller cam
alum rpm edelbroc heads (rect port)
Alum Air gap edelbroc intake

Any suggestion on Gears? :rolleyes::D

[GW56]

Here is a pic of her

[55mike]

I am running a ford 9" from a lincoln versalli with turbo 400 trans
the gears - i am a about change not sure 3:70, 3:90, or 4:11??
any input guys?

Currently i have 273 peg leg. Rims american racing 17"not sure of the width or backset.
Tires nitto 255/40/17

I need halp picking the right gear. I do close to no freeway miles and just want to feel the power for all the cash i have invested.

468 cid
800 holley dbl pumper
roller cam
alum rpm edelbroc heads (rect port)
Alum Air gap edelbroc intake

Any suggestion on Gears? :rolleyes::D

3.70's will be fine... You will probably want an OD trans as well.

[Str8axle]

57 Olds (stock width)
31 spline Summers Bros axles & spool
4.56 gears (5.13 for backup)

[Typhoontx]

Moser 12 bolt, 3.42 gears, detroit truetrac differential

Robert

[Jim '57]

I'm amazed!!! Two years and 125 post and only three post that have up-graded to independant rear suspension. Even the closet Ford..ers could use the Independant rear ends from the T-Bird Super Coupe or others.
And for us true Chevy guys ... Go Corvette.
Jim

[nhramike57]

10 bolt nova rearend with a eaton posi and 4:11 gears

[belairdave]

I'm running the stock 3:55 open rear end that the General installed back in 56.... Some day I might try to locate a P case posi just for braging rights because I never have had one before.... Later, Dave

[classic gary]

finally made a deal for a Camaro 12 bolt, w/ c clip elim's, girdle back cover, and disc brakes, and aftermarket posi w/3.73 gears, aftermarket axles. All things come to the patient man !!

[classic gary]

I'm amazed!!! Two years and 125 post and only three post that have up-graded to independant rear suspension. Even the closet Ford..ers could use the Independant rear ends from the T-Bird Super Coupe or others.
And for us true Chevy guys ... Go Corvette.
Jim

just a question: other than bragging rights, is an independent rear REALLY worth the $, trouble, breakage, and maybe handling ?

[Buckshot]

Stock 3:55 behind the stock PG. So far so good. Fuel prices are not making me dig for a 3:08 yet.

Gary

[Jim '57]

just a question: other than bragging rights, is an independent rear REALLY worth the $, trouble, breakage, and maybe handling ?

Yes! The 57 wagon I rode in, with same set-up I have, took to the curves like it was a sports car. I'm not sure what you are referring to about the trouble and breakage but the handling is greatly improved.
Jim

[GW56]

I am running a ford 9" from a lincoln versalli with turbo 400 trans
the gears - i am about to change not sure 3:70, 3:90, or 4:11??
any input guys?

Currently i have 273 peg leg. Rims american racing 17"not sure of the width or backset.
Tires nitto 255/40/17

I need help picking the right gear. I do close to no freeway miles and just want to feel the power for all the cash i have invested.

468 cid
800 holley dbl pumper
roller cam
alum rpm edelbroc heads (rect port)
Alum Air gap edelbroc intake

Any suggestion on Gears? :rolleyes::D
they are like round.
OKay now i have taken off the disc brakes and gotten to the backing plate. The nuts are soooooooooooooooo rusted. i am only trying to get a posi(instead of a peg leg 273) and change the gears to 3:55 or 3:70

BBC 468CID = TH400 trans

I am posting picutres.

Any adive would help.
i am about to put it all back together and take it to a shop i just do not have the tools needed. :confused0006:
:y::y::y::y::y::y:

[GW56]

here are the pics

[socal57chevy]

Let's take this to your thread to keep from hijacking this one...
http://www.trifive.com/forums/showthread.php?t=29016

[GW56]

Got it!

I will start a new thread about the rear project.

[wheelzup56]

A 9" ford with strange axles and spool, narrowed. (56gasser)
the other 3 cars are stock.

[tbm1949]

a nine inch 57 ford on four link with wilwood disks

[ColoradoCruser56]

Started with a stock rear end and after alot of broken axles changed to a 12 bolt w/4:11 Posi... Fixed my problem it held my big block.

[jamesvia]

I use the stock 3.73 rear end. Just finished installing new axle bearings and cleaned out the differential - new gasket, new bearings and fresh oil - very smooth.

[speedy55]

Ford 9" with moser axles and a 4.11 or 4.86 gear set.
Built the whole rear for $700 and then bought the 4.86 with nodular case and detroit locker (that tried to kill me) for $100

[tewitt1949]

57 pontiac. bolts right in and MUCH stronger than stock chevy.

[slotone]

Just blew my stock rear yesterday. I am looking into the explorer rear, called junk yard they asked if I want a rear out of a 6 cyl or 8 cyl. Whats the difference, and which one is everyone using? Also are all explorer rears posi?

Thanks Ken

I just installed a '97 exploder 8.8 rear.

373
31 spline moser axles
ford 9" ends
disc brakes

More info: http://www.trifive.com/forums/showthread.php?t=7483

[enigma57]

http://www.trifive.com/forums/images/icons/icon12.gif Ken, here is some info on the Ford Explorer rear ends......

http://www.therangerstation.com/tech_library/Explorer8_8.html

Most of the earlier year 6-cylinder rears are the 7.5" versions and much weaker than your stock '57 8.2" rear. The V-8 versions of the Explorer are 8.8" rears. Some are posi and some are not. Some have rear drums and some have rear disc brakes.

Also...... There were some problems with some years, so read through the article above and then read through the articles in this web search below so you can avoid the ones that were trouble prone......

http://www.google.com/search?hl=en&q=ford+explorer+rear+differential&sourceid=navclient-ff&rlz=1B3GGIC_enUS348US342&ie=UTF-8

Hope this helps,

Harry

[enigma57]

Stock rearend with something close to a 373 rear gear. I just squeezed on a set of Firestone Gun Dipped Cheaters on 7" rims to fit under the car with less than an inch from the inner fender well lip and the same to the factory placed springs. I'd like to find another rearend with the same width and use these wheels. Is there a stock rearend the same width? It has to be a perfect swap or I'm going to have to redo my rims. Tire are 9 1/2 inch wide and 30 inches tall.
http://i624.photobucket.com/albums/tt325/ScroungersCC/001-13.jpg

:wavey: Rebstew, sorry to be so long in responding to your question. I have been away from the forum for a while. Just now revisited this thread and saw your post here.

In answer to your question...... Yes, there is a bolt-in upgrade. The '57 Pontiac rear will bolt in and has the same width. The only change required is that the Pontiac has the 'big car' 5 on 5" bolt circle, so you would need to have the rear axle flanges and rear drums redrilled for the 5 on 4-3/4" Chevy wheel pattern (or redrill only the axles and use your Chevy drums) if you want to run Chevy rims in back.

The '55 - '56 Pontiac rear will bolt in as well and is stronger than the Chevy rear, but the '57 Pontiac is the strongest OEM bolt in you will find. The '57 - '64 Pontiac and Olds 9-1/4" rears were the ones run by many of the gassers of the '50s and '60s due to their inherent strength.

Olds axles of this series are larger diameter and stronger than the Pontiac axles. You can use the 31-spline Olds axles and 3rd member in the '57 Pontiac housing as a further upgrade. That is what I have here in case I decide to install a V-8 in my '57 one day.

Happy Motoring,

Harry

[USA1]

:wavey: Rebstew, sorry to be so long in responding to your question. I have been away from the forum for a while. Just now revisited this thread and saw your post here.

In answer to your question...... Yes, there is a bolt-in upgrade. The '57 Pontiac rear will bolt in and has the same width. The only change required is that the Pontiac has the 'big car' 5 on 5" bolt circle, so you would need to have the rear axle flanges and rear drums redrilled for the 5 on 4-3/4" Chevy wheel pattern (or redrill only the axles and use your Chevy drums) if you want to run Chevy rims in back.

The '55 - '56 Pontiac rear will bolt in as well and is stronger than the Chevy rear, but the '57 Pontiac is the strongest OEM bolt in you will find. The '57 - '64 Pontiac and Olds 9-1/4" rears were the ones run by many of the gassers of the '50s and '60s due to their inherent strength.

Olds axles of this series are larger diameter and stronger than the Pontiac axles. You can use the 31-spline Olds axles and 3rd member in the '57 Pontiac housing as a further upgrade. That is what I have here in case I decide to install a V-8 in my '57 one day.

Happy Motoring,

Harry

Way cooler than any of Henrys options I wish that I could find one.

[15055chevy]

I have a 12 bolt, from a 68 Camaro. That's all I know...it was already installed when I bought the car.

[John T]

12 BOLT
Type 4 carrier
4:88 gears

:D

[petes83usa]

12 bolt out of a 72 chevelle 3.55 gear posi......pete

[ColoradoCruser56]

Hey you left off 12 bolt, guess my other vote will cover that:D

This Randy has to agree with Randy. 12-Bolt with 4:56, am going to put in a 700R4 this round so will probably have to change the R&P.

Randy in Colorado

[MRWRENCHMAN]

OK here's one I haven't heard yet , I am thinking of using a 8.8 Lincoln Mark VIII diff . They have a aluminum center, control arms and come mounted in a cradle like the XKE type rears. Should not be that hard to install. As I understand they will hold up to 500 HP . Don

[hddude]

had to post! i can finally post something without asking a question!!! allright! just got it back, not even in yet. `57, stock housing, posi, yukon gears and kit from randy`s. moser axles are on the way.

[hddude]

ups just left, moser axles, look good.

[wraplock]

How much were the axles?

Don

[hddude]

$345, $40 shipping.

[wraplock]

Thanks for the price! Is there any real advantage over the stock axles when using the stock rear? I'm trying to decide if I should go with these or just reinstall the stock ones.

Don

[elleka]

9" Strange, 3:73, 31 spline, posi, 12" Wilwoods . . . can't wait to drive this grocery getter. This is going to get me to the store lickity-split.

[hddude]

wraplock, i don`t know. i`ve talked to a few local guys who use there car[5,6, and 7`s] for an ocasional track run, and they say the axles do twist. ****, one guy said he replaces his when they twist 3/4 turn. with having the center section new, i just don`t want any weak link. moser says they are 30% stronger. it seems like so many of the members here use a 9inch, even 12-bolts. i just did`nt want to spend 2000 on a rear. blowing the $$$$$ on the engine.

[wraplock]

Dude I hear ya! Maybe I should give them a call and get a set for myself. Then I won't have to deal with shortening a stock set. I just saw your post about the axle bearing retainers. I assume with these axles you have to find your own retainers. It is starting to look like it could be a problem if you don't want to remove yours from your original axles. I guess that's why you didn't get the axles with the bearings installed.

Don

[hddude]

that`s right, wraplock! i don`t kmow. alot of talk about twisting axles, so, the money i`m putting in this,,,,,,,,what the **** is another$350? piece of mind? now the "entire" rear is new. man, i can`t find "new" axles retainers. found a set, here in pa. $20 each for used, gonna do it. don`t want to disturb the other axles, just in case. it could be a fast swap.

[wraplock]

Hey Dude I hear ya. Im looking around for axle retainers. May have to buy a set of axles just to get the retainers. Anyone got a set of bad axles with good retainers for sale?

Don

[wrenchbend1]

My 57 had a rear from a 1969 Pontiac Gran Prix ,the perches were welded on and already situated . I cant complain its a 12 bolt posi but it has required me to go after bearings

[larry48]

Started with 4.10 gears, went to 3.08 ended up with Yukon 3.55 for a great match with motor & trans change.:anim_25:

[northern56]

Ford 9 in, 411w/posi, 31 spline Moser axles

[DAVIS BOYS RACING]

FORD 9 WITH 3.64 GEARS AND A LOCKER

[auggie56]

Stock Explorer 8.8 3:25 ratio.

[boha1957]

Narrowed 9 inch with 3.50 gears.

[randyfox]

Ford 9" with Detroit Locker and Strange axles.

[55 Stick Car]

Complete Mark William's Dana 60 with Richmond 6.50 pro gears.

Allan

[rj57]

I feel left out.

All I have is the stock, original rears under all my '57s.

Did have a '72 12 bolt under my pink/white Hardtop once. Sold it for what I had in it like an idiot. The auto insurnace I had at the time said anything other then stock they would not insure. So I started taking non stock parts off my '57s. One day my mother said, "Why not find an insurance who will take a non-stock '57?" (I hate it when she says things that make sense)

By then the 12 bolt was sold and stuck under a '56 Nomad.

[KDs56210]

Man there's alot of money in rear-ends in here! I still got the stocker (whatever it is in a 56 210 sport coupe)..Have a feeling that after the BBC instal is finished it wont last long! lol:)

[hddude]

hey, wraplock, did ya ever go where i told ya?

[wraplock]

No Dude, I still haven't gotten around to it. I've been busy at work and the posi rear still sits on the bench. Cruis'n season now don't want to lay it up. Probably this fall. Hey how is your rear working out/

Don

[hddude]

the rear? working out tearribly! i twisted the housing right off the perches! broke the pinion yoke off. got a new hosing, welded the reches, all the way, the entire length of them. they only had 6 spot welds on. so back in it goes, today or tomorrow.

[Twinn Engines]

I know that there is a category for other, but wouldnt a 12 Bolt have been a good choice as well to list?

[jts57ht4spd]

mines gotta 8 inch ford, for the narrowness, setting in it. needs finish bolted up when i get the other parts lol :sign0020:

[mitch hennings]

came with 79 camaro 10 bolt possie 2.56 gears

[56owner]

9"Ford narrowed 2" new trac-loc 3.50 gears with Disc brakes w/internal parking brake MOSER Axles.1350 Yoke

[belairrudy]

Stock 3.55 ratio... but plan on changing to 3.08 in the near future.

[kob153]

please explain what kind of car did u get this rear from in the junk yard thank u i have a 55 4 door i wont to put a wider tire on it they say wit an stock rear the widest u can put is a 15X7

[JIMS 56 CHEVY]

8.8 FORD, 373 POSI GEARS

JIM

[fiddlerpin]

Stock open rear with 3:55 gears (3 speed) 283 Powerpack 4 barrel carter

edit: Now muncie 4 speed 1965 2:56 1st gear, 283 Powerpack 220 hp.

[johnny speed monkey]

Stock 10 bolt, stock axles, 3.55 with an Eaton posi. Have to notch the rear for the Eaton as it is not a factory posi.

[1Evil55]

12 bolt out of a '65 Nova with 3.73 posi.

[Thadd]

I am running a 57 rear under my 55. Since I have owned the car, it has had 4.11, 3.70, 4.56 and 3.55 gears in it. I am of the old school belief that, if the factory 409's were raced with the stock rear ends, my mild (but blown) 350 can not dish out as much punishment as those SS guys.

I currently have a 4.56 posi, but I have a 3.70 posi to go in it to make it a little more freeway friendly.

I am running a 700R4, and with the 4.56 and the 3.06 first gear, it leaves HARD !!!

I am running 7" Cragars with a 4.25" backspace. The rear tires are 275 60 15's and they never rub.
This is how it sits with two coils cut in front and 2" blocks in the rearhttp://pic20.picturetrail.com/VOL22/571765/9618134/136688665.jpg

[zr1john]

Im running a ford 9 in. 59 in wide. cutom made housing with smooth back. Strange Engineering 3rd member with big bearing Nodular iron case, Detroit Locker, 3.70 gear, 1350 ujoint and 35 spline Strange axles and rear disc brakes.

[hddude]

Thadd, my thoughts, exactly. i pre-load mine, just a hair before the clutch flies.

[oceangoer]

I have a Dutchman's 9 inch, with new tubes, large bearings
Alloy Axles, HD perches, four leafs, Air Rides rear bags, and
a custom Air Ride Controler.

Michael..

[JIMS 56 CHEVY]

I have a Ford 8.8, posi with 373 gears.

JIM, 56 BELAIR 2DR SEDAN

[piggy]

:rolleyes:I have replaced mine and now I have a Mystery. Straight 6 ^ three on Tree and now speedometer is off 20-24 miles per hour (Slow reading yet passing folks......Fun reads 46 doing 68 or so.)
Anyone want to guess a gear ratio?:wavey:
Pig is me

[dyoung@nespower.com]

Stock 57 rearend with ’64 3.08:1 open. I’m tried of it stumbling on breakaway from dead stop so I’m putting my ’57 3.55 back in. Have a late 3 series posi case I’m considering putting in the 3.55

[texancare]

I'm running 3.73 posi with disc brakes from an early 80's trans am. Direct fit.

[hqtrqd55]

I am running a recently discovered blown up 10bolt with 2.56 posi. :bowtier:

[55chevr]

55 has a 10" out of a Buick Grand National ... was 3.40 ratio changed it to 3.70 ... Joe

[AlwaysWantedA55]

Narrowed S&W Race cars custom 9" Ford.

[Jims56]

GM 12 bolt 4.10

[jgrohio]

Dana 44 390 gears

[Graffiti55clone]

what types of rear ends are you guys running in your classic trifives?

I pulled out a 96 Blazer 4x4 rear at a U Pull It wrecking yard for $110.00.. They're 59 inches wide with factory 342 gears and a posi... Welded on new spring perches..... If your running a small block and cruising around and not beating the dog poop out of it with slicks on this rear end is the way to go.. Only draw back is that the studs are metric.. Knock em out and put regular ones in and off you go.:bowtieb:

[superdaves]

stock rear with 3:70 for now ,,,,, until it breaks,,,,, and then on to bigger better ,,,, but not sure what yet???

[blonby]

Does anyone know if there is a car out there that has a 9 inch ford in it that is measured at 58 inches so that I can put it in my 55? I have a 9 inch already however by the time I shorten it center section and everything else I will be spending 1200 1500 too much for now. So Im looking for what else will work thats not going to kill the finance book for now lol. Let me know what your ideals are I would eventually like to run 20s and 18s. however i want to get car on road and then later I can buy 18s and 20s and put them on.

[57danr]

How about having not break at all and enjoying your 8.2 drop out 10 bolt? Check out this company http://www.bruneauperformance.ca/intro.html

My 2 cents

stock rear with 3:70 for now ,,,,, until it breaks,,,,, and then on to bigger better ,,,, but not sure what yet???

[blonby]

Stock with a 3.73 posi now but just picked up my housing that I had narrowed. Soon I will have a 54" ford 9" with 31 spline dutchman axles, 4.10 gears and a posi.

you say stock... So you have a stock rear end and put a 373 posi in it? If so I would like to do the same where did you get the possi from? What did you have to do to make this work?

[hddude]

57danr, i don`t see anything about our rears on that site. what are you referring to?

[hddude]

i found it. sorry.

[blonby]

How about having not break at all and enjoying your 8.2 drop out 10 bolt? Check out this company http://www.bruneauperformance.ca/intro.html

My 2 cents

Thanks for the info however Im not sure where to go once I get on the site? If you used them can you be more specific on what you purchased and who to talk to

[57danr]

Hi, the links to the page are on the left side under our products for 409 cars then at the bottom of that page. Here's the direct link to the page---it should be anyways?

http://www.bruneauperformance.ca/intro.html

His name is Aubrey and he is the man with everything to bullet proof your factory rear. I have been talking with him back and forth the last few days.
His email is listed below. I am taking all of his advise. He has the kits to turn your factory 17 spine posi unit into a 30 spline and then using 30 spine axles. Bearing girdles and many more parts! Best inormation I have found on the internet. Keep your old or buy a new factory posi unit to do these modification - very important!!!

Here is a link to a past TRIFIVE page with all the parts he sells for our factory rears- look towards the bottom http://www.trifive.com/forums/showthread.php?t=24805

nhrastocker409@bruneauperformance.ca

If you need anymore info - send me a email.

Dan

Thanks for the info however Im not sure where to go once I get on the site? If you used them can you be more specific on what you purchased and who to talk to

[Maftew]

10 bolt posi 4.10 came with the car.. looking for a 3.73 anybody have an extra one?

[Mr. Jean]

Camaro 10 bolt with posi and 3:42's. I had 4:10's earlier, but found them to steep, with the 350 turbo for highway driving.

[blonby]

Hey guys..i've got so many differnet answers here locally so i'd thought i ask all of you guys(and girls)..my 55 has a late 60's or early 70's chevelle rear end with 4:56 gears....i've been told that a early 70's nova would fit right in with no drive shaft modifications..i've also heard that a late 70's trans am would also work with some mods to it. I want to run some highway gears probably around 3:42 or even a 3:08...I'm running a 383 stroker but wanting a daily driver not a drag race car....I'd love to find something to fit right in with posi trac and some stock highway gears....please help

Kychevy55
What info did you find out about a rear end? What did you end up going with? Pm Me if you can thanks :wavey:

[chrismike]

The car came with the original open rear with a loud whine and a vibration that I thought was the driveshaft. New input shaft,universal joints and balanced. Vibration gone, was still loud. Got lucky and found a like new Currie bolt in 9 inch locally.

[57wagonbeast]

my 57 wagon came with mosier internals 35 spline with spool 9" - 4:30 gear // rear springs moved inboard and minnie tubbed -- OLD DRAG WAGON.

[jte1974]

what types of rear ends are you guys running in your classic trifives?



the one that takes a beating and looks good under a street rod..... 9'' 4 link coil over

[rusty belair]

so an s-10 rear will work iff i cut and move the perches??

i used a s-10 blazer 2wd and added disc hubs from a 4x4 tractor supply had perches that worked just fine oh the rear end came off a 99 model blazer[limited slip]

[430HPChevy55]

Right now have a 10 Bolt out of a Camaro, Diac Brakes, with 3.73 gears....... works good.......But can always go Bigger......$$$ .... Dan

[sedandelivery55]

My '55 has an oddball 8.5". It's an '80 Buick Regal housing and 28 spline axles with '77 Buick Century 11"x2" drums and brakes. It has the factory axle retainer instead of c-clips. I installed an Eaton unit with 3.73's and it's held up to my driving so far.

[gmgary]

Ford Nine Inch, in my 57 and 55.

bowtie-trifive