I've done a little research and called a few shops. I need to know if you can put a 3 series ring and pinion in a 2 series case by adding shims. One person that I talked to said he would have to order whole new diff. case to fit my desired 3.23 or 3.42 ring and pinion in the stock 2.41 case. It's a GM 10 bolt, 7.5. Thanks for your help.
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