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Old 12-07-2011, 05:22 PM
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catso catso is offline
Location: Chicago
Join Date: Dec 2009
Posts: 3,112
Mein Auto: 2000 323i, 1988 528e
I think your model (the EH) is the electronically controlled trans. There's a computer or controller module that determines when it shifts. There's probably a variety of factors; vacuum, temp, speed sensors, etc. My guess is that may be the cause. Many older BMW's always seem to suffer from some electrical problems. I would carefully check all the connections, wiring, ground points, etc. and all the vacuum lines, coolant sensors, basically anything that signals the controller.
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