troy1

I would like to change the rear end from 2.73 gears to 3.42 and add a positrac.

any spec information to start hunting for parts would be appreciated.

troy

88 coupe

Check with Brian: thetrickfamily@yahoo.com

He is a well known Olds guy, whose specialty is Olds rear ends.

Norm

Kennybill

You will have to go to an after-market housing such as a corporate 12-bolt GM or a Ford 9". After-market gears are non-existant for 1965-1970 Olds. The best u will find, if u r lucky, is a 3:08 posi. I am into the "big" Olds and I have looked for years for better gears, the best I have found is 3:08. I have several 3:08 Posi, most in my cars. Good luck, Ken

rocket9r8

hey there, yep kennybill is on target, nobody home in the after market, i did all what kenny said to my 98 convertible except the rear end boy does it scoot! thanks kennybill

Edveen

Richmond Gears makes aftermarket Rings and Pins for the O-type posi unit.
http://www.richmondgear.com/01gm.html

They only fit for the #671 (3.08's 3.23's) posi carrier though.

This information is from Brian Trick (as mentioned above). I've mentioned this before. If your going the posi route, I highly recommend for anyone to talk with him. He is awesome.
By the way, Brian can make those richmond gears fit #672, #588, and #673 posi carriers.