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September 15th, 2007, 10:00 AM
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#1 (permalink) |
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Junior Member
Join Date: Sep 2007
Posts: 2
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1970 olds 98 455 rear end posi
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 |
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September 16th, 2007, 12:11 AM
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#2 (permalink) | ||
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Junior Member
Join Date: Oct 2004
Location: Southern CA
Posts: 2,032
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Check with Brian: thetrickfamily@yahoo.com
He is a well known Olds guy, whose specialty is Olds rear ends. Norm
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September 18th, 2007, 07:20 AM
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#3 (permalink) |
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Registered User
Join Date: Aug 2005
Location: Youngstown, Ohio
Posts: 286
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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
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A man has to know his limitations, especially with an Oldsmobile    
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February 8th, 2008, 04:54 PM
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#4 (permalink) |
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Junior Member
Join Date: Sep 2006
Location: tacoma,washington
Posts: 16
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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
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February 12th, 2008, 02:49 PM
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#5 (permalink) |
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Registered User
Join Date: May 2006
Location: MD/DC
Posts: 30
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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. Last edited by Edveen; February 12th, 2008 at 03:02 PM.. |
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