One of the first steps in drifting it to lock up the rear wheels. I replace all the seals in the junkyard 3.15 diff, weld it and give it a fresh coat to high temp paint. The 3.15 differential is about a 300rpm difference compared to the stock 2.93 differential.
**Race Differential Bushings-E36
https://amzn.to/2BoDVVH
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