charles28 117 Report post Posted February 18, 2013 (edited) Does anyone know what the stock diff ratio is on a SA 325i automatic? I assume its 3.64, but does anyone know from experience? All I can tell is that its a medium case diff, I can't see the markings on it. My cars been converted to manual, but will be looking for an LSD diff soon, i just want to choose the right ratio. Thanks Edited February 18, 2013 by Charles32 Quote Share this post Link to post Share on other sites
BM WORLD 1264 Report post Posted February 18, 2013 3.64 and 3.73 are comon ratios. installed in those you choose what you want i have a 3.91 lsd for one and a 3.25lsd use this to work out your revs at speeds etc http://members.dodo.com.au/~wawawa/revs.htm Quote Share this post Link to post Share on other sites
