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Let me start by saying I have and have had 3 740 / 760 turbos and 3 240 non turbos But my 1990 760 t has developed a vibration in the engine that I cannot find, I have tried replacing the motor mounts, transmission mounts and drive shaft center bearing assembly, only to find that the vibration is in the engine, it stays constant with the RPM's The car runs great, no smoke, knock or any odd noise. I am quite baffled; none of the other cars I have or have had have ever done this. And suggestions would be greatly appreciated.
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