Question about BMW 750
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Posted on Jan 02, 2017
SOURCE: E32 V12 BMW LOCKED IN 3RD GEAR
Really a nice car. If this is an automatic, some Manufactuers use Electric solenoids to switch gears. A bad connector underneath the car could be blocking the signal.
For a stickshift, some use a slave cylinder to aid the clutch operation. If the slave cylinder is electric, it too could stop you from shifting into another gear.
You can try alldatadiy.com for wiring details. Autozone.com also has free wiring details when you register your vehicle with them. I am untrained for BMW products. Your best chance is to find where the Tach feed is attached to get its readings.
The Powertrain Control Module may tie both functions together. Also worthy of comment is your Security system and Ignition key. Perhaps the Antitheft is keeping the trans locked in a single gear.
I hope my solution helps you.
Posted on Aug 14, 2012
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