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Old 03-17-2013, 04:20 AM
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Rear end swap

I have a chance to buy a rearend out of a full sized 1993 Buick Estate wagon with a 3.23 posi, I was thinking about replacing my 8.2 ---3.08 "single tire fire" in my 2 door 67 Buick Skylark. Of course I will measure for drive shaft length/ yoke size/ axle to axle length etc.... Before I start pulling Both rearends out ---Is this do able, since there is a big difference in the years.
Thanks JIM

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Old 03-17-2013, 04:33 AM
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Not sure, but I bet the mounting points for the control arms are way different.
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Old 03-17-2013, 05:22 AM
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Rear end swap

It looks to be the same, with some measuring. I hope to find out if the control arm brackets are higher or lower
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Old 03-17-2013, 07:56 AM
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The angle of the upper controll arm eyes is different. You will have to fabricate some controll arms to correct the angle difference. You will also have to modify or replace the lower controll arm brackets on the axle tubes. The bolt pattern for the wheels is also going to be different. The "posi" is going to be the Auburn, so chances are it's pretty worn, and they can not be rebuilt. Look into rebuilding the BOP 8.2 rear end that you have instead of doing this swap. You may be better off with your rear end rebuilt. The BOP 8.2 is a pretty strong rear end.
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Old 03-17-2013, 08:21 AM
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rear end swap

Other than changing the differential fluids, I have never messed with rear axle. Roughly, how much am I looking at to change to a 3.23-3.42 posi by a professional
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Old 03-17-2013, 11:41 AM
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In addition to all the problems posted above with mounting point geometry and wheel bolt pattern, the 8.5 in the B-body wagons is several inches wider than the ones in the sedans, which are still wider than the 67 A-body axles, so unless you plan to have the tires sticking WAAAAY out of the wheel wells, this is a bad idea.
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Old 03-17-2013, 01:19 PM
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A new posi is about $500 and a set of gears is about $200. You will need a good installation kit which is about $125. Labor will run about $300 to $500 in most places.
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Old 03-17-2013, 09:34 PM
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rear end swap

Okay, So I can expect to spend between $ 1100 --$ 1300 Bucks. Now I Know at least what to pay. Thanks everyone--------------------JIM
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