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Transmission and DriveLine Questions Ask all your Transmission and DriveLine Questions. Tranmission, Drives shaft, Rear End, Gears, etc

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Old 05-10-2010, 07:35 PM   #1
hddude
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Default DRIVE-SHAFT LOOP

well, after seeing mine, fly across the road sat. nite, when my rear broke loose, "What`s the best way, and where should this go?" i was told, bolt it to the floor. i don`t think so. i bought a universal one from summit. thanx.
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Old 05-10-2010, 10:09 PM   #2
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well you can either bolt it in or WELD IT in! I made mine and it bolts to the floor brace behind the tranny into some "pre existing " holes. I think they were for emergency brake but i dont have all that stuff so...........................
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Old 05-10-2010, 11:57 PM   #3
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well, after seeing mine, fly across the road sat. nite, when my rear broke loose, "What`s the best way, and where should this go?" i was told, bolt it to the floor. i don`t think so. i bought a universal one from summit. thanx.
hhdude, That's how my buddies did it in the 70's. If it is good enough for NHRA, what the hey. An alternative would be to install a cross member with drive shaft loop.
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Old 05-11-2010, 05:35 AM   #4
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i ended up making a cross member with the drive shaft loop welded to it. i figured you couldn't go wrong with a little more structural integrity in the stock frame. especially since technically the stock frames only connect at the very rear of the car and underneith the front of the motor.
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Old 05-11-2010, 07:50 AM   #5
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N.H.R.A. has a spec for a distance behind the front u-joint? and bolt to the floor is ok with them?
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Old 05-11-2010, 08:52 AM   #6
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I never bolt them to the floor, it makes their removal too difficult. I have one on my 55 that bolts to angle iron welded to inside of frame. The loop bolts to the short peices of angle iron. I have 3 Camaros with similar arrangements with angle iron tabs welded to the sub-frame connectors. On the Camaro it is easier to remove trans crossmember without loop in the way. If bolted to floor the bolts will be covered by seats & carpet.
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Old 05-11-2010, 06:23 PM   #7
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N.H.R.A. has a spec for a distance behind the front u-joint? and bolt to the floor is ok with them?
I have a NHRA 2010 rule book at home. I remember it saying it has to be within 6 inches of the u-joint. Don't recall any spec about where it needed to be attached at but I'll check later on when I get home.

A note here. Just because it says so in the NHRA rule book doesn't mean it's the best or smartest way to do things. It's just there way. Case in point, they say the battery positive should have a quick disconenct switch. Anyone that knows electricity would put it on the Neg. side.:stupido3:
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Old 05-11-2010, 07:14 PM   #8
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Default Drive shaft NHRA rules

HHdude, "All RWD cars running 13.99 or quicker with slicks and 11.49 or quicker with street tires must have a retainer loop 360 degrees of enclosure, 1/4" minimum thickness and 2" wide, securely mounted and located within 6" of the front universal joint for support of the driveshaft in the event of universal joint failure....." NHRA Rule Book
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Old 05-11-2010, 07:29 PM   #9
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i thought i saw something like that. thanx!
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Old 05-11-2010, 07:57 PM   #10
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I bent up some 1.5" .120 wall round tube and made a loop for mine. Called NHRA and they said it would work.

Many of the type that bolt to the floor allow you to just remove the bottom loop. Should not be a reason to unbolt it from the floor. They are very easy to use and work fine.
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