When I rebuilt my M97 I replaced all bearings.FAG bearings do work out cheaper but there is one bearing from the output shaft front if I remember well which is a BMW only !! Prepare to bend over and be shafted. http://www.advrider.com/forums/showthread.php?t=287650 Is my thread from years ago with bearing numbers. The good news is that if you get the shimming spot on it will shift like never before.