I was recently driving down my block with a cold 1989 BMW 735i. After about a quarter of a mile, it complained of a Transmission program, and the next message was "see owners manual". The car did not get much power, and upon looking in the owners manual, I found it was stuck in
4th gear as a precaution. I pushed it closer to the curb while it was idling, and it started making a clicking noise, then grinding. It sounded like a transmission pump running dry, but I checked the fluid level, and there was plenty. Is it the transmission pump going out, or is there some cable or electrical problem that I don't know of? Thanks!