Rear diff interchange?

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Old 11-18-2003, 12:32 PM
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Default Rear diff interchange?

So the rear diff on my 88 90q has a lot of slop in it, (348,000 miles) and I was looking at a 5000q parts car the other day. Would the rear diff assembly swap into my car? Do any other models swap?
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Brian
Old 11-18-2003, 12:51 PM
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Default Never mind, I answered my own quesiton...

5000q final drive is 3.89, 90q is 4.11.
Poop.
Old 11-18-2003, 07:55 PM
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Default Re: Never mind, I answered my own quesiton...

5kq = 4.11
5ktq = 3.89

They also have a VERY different rear diff case than your car. Grab a late 4kq, or any B3q rear diff.

And how do you know that the diff has slop in it? They usually don't, ever.
Old 11-19-2003, 08:15 AM
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you can turn the driveshaft about 20 degrees before the rear cv axles start to move...
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