Re: Transmission Problem (archive)

With an intermitten problem like that I would look at the connection between the trans wiring harness and the car end. Clean both ends really well then look at the connection between the tranny computer and the wiring loom. Did you buy a NEW SEM switch? I think the problem may lay in the tranny computer or valve body wiring harness or it could be in the valve body (sticky pressure solinoid or shift solinoid) Have you had the tranny computer scanned or set in basic setting? That also brings to mind this could also be related to a glitch in the TPS (throttle position sensor) Hope some of this info helps and please keep us posted!

At various, but differing times and situations, the transmission of my 88 735i races first, then jumps into 3rd gear. It is then in the M transmission mode. Often this happens first thing in the morning, but not always. Sometimes, I can be 100 miles into a highway trip and then it happens. If I pull over and shut off the car, and wait for a minute, when I start up again, I may be good for the next three days (or the next three minutes). At the tranny shop, they feel that it is the result of a faulty sensor, but they can't find the problem. They did a fairly complete overhaul on the transmission, but the problem continued. The dealer replaced the S, E, M switch, but that didn't help. Anybody out there got any suggestions? Help!
Gerry

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