Hello. I have an overdrive issue on my 89' 740 16v. I haven't had overdrive/ 4th gear since I got the car about a month ago, so I installed the overdrive bypass and oddly I only got into overdrive/ 4th gear once and only once, I've tried basically everything, I've adjusted the cable, I loosened the plate and started the car I filled up the tranny with fluid. anyone have any ideas????? Thank you