danutt 4 Report post Posted November 1, 2013 i got a 3.64 medium case diff thinking what i had in the car was taller want shorter gearing so in need of something shorter ive check real oem and shortest the e39 came with was 4.10 in thailand built 528's so what i was thinking and im hoping someone here has the know how as well as the can do attitude 3.91 diffs are medium case from e28 could the internals be swapped?what about e34 diffs etc?? car is auto if that helps-and no not interested in a manual conversion...seems too pricey for now but would be nice Quote Share this post Link to post Share on other sites
Nobimmer 694 Report post Posted November 1, 2013 Talk to Kayne Barrie, He is the diff/ gearbox expert and will point you in the right direction. Search for Kayne barrie motorsport I don't have his number on me at the moment. Quote Share this post Link to post Share on other sites
danutt 4 Report post Posted November 1, 2013 will do hopefully wont be too pricey -done diff upgrades on my past e30s with good results -enjoy the out of corner push, thanks mate Quote Share this post Link to post Share on other sites
