i have a 525i 92 model that recently went for a gearbox overhaul after gears started slipping and eventually wouldnt drive forward .now after the overhaul the car takes uses 2nd gear for take off n dr

Asked by Aug 20, 2012 at 12:01 PM about the 1992 BMW 5 Series 525i

Question type: Maintenance & Repair

after the overhaul the car takes of with gear number 2 and drives with the same gear .it doesnt change
but reverses well .wat could be the problem because the mechanic is telling me that the computer box
has to be defaulted and its not responding ,so the computer box is faulty....hw possible could this be
?

2 Answers

210,105

Not sure, look at this website, maybe it will help......http://www.bmwe34.net/E34main/Trouble/TransProgram.htm

2 out of 2 people think this is helpful.
4,155

It sounds like your transmission is in limp home mode. This could two issues a bad rebuild and the internal issue could have occured. Or yes it is possible the module failed but I wouldn't try that yet. In the module there is a computer chip called a eprom (erasable programmable read only memory) BMW had a SIB (service information bulletin on replacing this eprom with an updated part. But this is only after checking some of the shift solenoids. The link Tom has given you is a good read and at the bottom has very good information about the resistances of the solenoids of the transmission. Your other option is to let the dealer scan the system for faults and then go from there for what it might be. Hope some of this helps.

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