Here is a pretty neat calculator:
https://spicerparts.com/calculators/...rpm-calculator
I've used it when I installed S52 in my E39 528iA and wanted to know ahead of time what would be the best diff ratio to work with ZF 5 sped tranny:
https://www.bimmerforums.com/forum/s...swap-on-my-528
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2010 BMW M6 * Black Saphire Metallic * Full Black Merino Leather
2019 BMW X3 M40i * Alpine White * Mocha Leather
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