Getting ready to put a Ford 9 inch in my 57, already have a ZZ4 and added a 700R4 a few years ago. I am running 235/70 15s on the rear. Anyone give me some insight on what gears to use on this rear diff addition?
I am looking for highway and in town operation vs racing it. Performance now with the stock rear end is OK for me, although with overdrive in it now, it could stand to gain a little better street performance.Depends on how you drive and what is important to you as far as the emphasis on performance/economy.
Depending on how much highway driving you are planning, what speeds you will be traveling at, and what rpm you want your engine turning, can be seen with a transmission ratio calculator.I am looking for highway and in town operation.
With a low, low first gear of 3.06 on 700R's I shouldn't think takeoffs would be a problem even with 3.36 rear gears.There isn't much difference between 3.36 & 3.55 in RPMs or takeoff to justify the cost in my opinion....3.73s is what most people use with that transmission for decent takeoff and cruise RPMs....