Hi , I come in peace as a fellow BMW owner. I am wanting to put 4.10 gears in my 850ci. All M5s(e28)(e34) 540s 750s and 850s share the same size diff. Most of the 8 guys own 6spd, so they havent needed gears as low as 4.10. I have an auto. I need to know if anyone who reads this board has put 4.10 in an M5(e28). Korman lists them on his website, but I havent yet been able to contact him. Any information on whereabouts of 4.10 gears, who makes or sells them etc would be greatly appreciated. Thanks, Jim.