Guest Posted March 25, 2002 Share Posted March 25, 2002 Hey Guys,<BR> My 71 Skylark has highwy gears and isnt posi. I recently found a Olds 12 bolt with 3.55 gears cheap! Does anyone know what would be involved to do this swap??? Thanks Link to comment Share on other sites More sharing options...
Guest Posted March 26, 2002 Share Posted March 26, 2002 What body/model did the rear come from? Link to comment Share on other sites More sharing options...
Guest Posted March 26, 2002 Share Posted March 26, 2002 I believe it came from a 1970 cutlass. I have heard these rears are 12 bolt with 10 bolt guts??? Link to comment Share on other sites More sharing options...
Guest Posted March 27, 2002 Share Posted March 27, 2002 I would think it should work, it's a A-Body right on.. But Buicks are better Link to comment Share on other sites More sharing options...
Guest Daves69 Posted March 27, 2002 Share Posted March 27, 2002 The Olds rear will bolt in. You might have to modify the driveshaft to match the yoke or it might not be the correct length. Your original rear is a 8.5" corporate rear lots of parts available to upgrade. Link to comment Share on other sites More sharing options...
Guest Posted April 5, 2002 Share Posted April 5, 2002 I have also been considering replacing my rearend <A HREF="http://buickperformance.com/axles.htm" TARGET=_blank>http://buickperformance.com/axles.htm</A> may be able to provide some information. <P>I had a bad rear in my 70 when I bought it, and put a 71 3.08 that came with the car, I ended up having to cut the driveshaft about an inch and a half to accomodate the 71 rear. My guess is you may have the opposite problem - your driveshaft may be short 1.5 inches. That site above describes the situation - check it out.<P>Francisco<BR>72 Skylark 350 Suncoupe (RIP)<BR>70 Skylark 350 Current bundle of joy! Link to comment Share on other sites More sharing options...
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