GM B-Body Forum
- Posts : 680
Join date : 2013-01-14
Age : 24
Location : Flint/Detroit, MI - Charlotte, NC
Even if you just changed the gears you would still have to shim the pinion, more than likely the factory shims wont be correct, if your not changing the carrier then you can reuse the carrier shims. But you will have to check for backlash and ring and pinion marking engagement. Youll also have to purchase a beam style inch foot pounds torque "wrench" to measure the preload on the pinion bearing from crushing the crush sleeve. I know on the 8.5 its around 26 in lbs. Purchase a few extra crush sleeves, its sometimes hard to get it right the first time. If you purchase a master rebuild kit it will come with all the bearings, shims, crush sleeve and usually some marking compound. But as stated above, its alot of work if your just going to change gears on an open carrier, might as well change it while you are there.
1979 Caprice Sport Coupe, 400hp Vortec 350, Th350, GM 8.5 w/disc brakes, 3.90 gears Detroit Truetrac, 2.5" stainless duals w/ x-pipe, Dynomax race bullets.
1984 Caprice Sedan, 305 motor, 700r4
1978 Caprice Sedan, 305 motor, th350
1993 L99 Caprice, 4.3 v8, 4l60 trans
1972 Ford F-100, 302 windsor, c4 trans
2001 BMW E46 330i, 3.0L