Rear gear change

[Jerry@CHP]

Yes, GM gears are the best for your application.

In the world of 12 bolt Chevy, typically, the pinion shim is always a .029 shim and might be the same case with your rear axle. Gear patterns always come out nice with GM gears using the .029 shim and about .008" back lash in the world of 12 bolts.

Most people who have been doing rears for many years usually have a big supply of GM shims and such on hand. I do. But it's a 40 year accumulation.

Get them to shim your posi unit clutches while you have it apart.

Going through my parts yesterday, I found a pair of NOS BE posi carrier spring plates. Still have the parts stickers on them. Is anyone getting aroused yet? I used to have tons of BE rear stuff back in the 1970s as that was what would hold up in drag racing!

Jerry

[Jerry@CHP]

Joe,

Being you're an Olds guy, you would love my buddy Sam Murray's cars. Has the Brainbeau 67 Olds 442. Car can run 10.90's in good air, E/Stock Eliminator 400 inch engine, 4-speed.

I turned Sam on to a buddy of mine's car a few years ago. 1971 Olds Cutlass 350 4-speed that Wayne Shipley built from the ground up. Wayne lost interest in the car, sold it to Sam and Sam just set the NHRA national record with that car, think it's 11.37 with a low compression 350 in a 3500 lb car! It's a rocketship! Tom Boucher does all of his machine work up in the New England area. Sam is one of my best buddys and has even stooped low enough to help work on the new 302 mutt that I just built.

Jerry