Sorry to hear about your prob's. I can't be of much help, but I'd start with changing the fluid. You'll need Dexron III fluid for that tranny. Also, you might as well change the filter too.

I really don't know why it would do that; maybe the fluid is in such bad shape it can't take the heat any more? If the fluid/filter change doesn't work, another possible culprit could be the vacuum system. Check the vacuum line that goes from the intake manifold to the tranny for any leaks. You may also want to swap the vacuum modulator, but that's just a blind suggestion.

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1990 190e 2.6 - The only one I can really call "My Car".

1987 190e 2.3 - The donor car's up and running, only mods are Euros and a Sony headunit. My Dad's runabout now.

1990 300e 2.6 - The parents' ride.