Q. What is a clutch stop?
A. A clutch stop is a device used to limit the throw of the clutch pedal to the precise point where the clutch engages. This, in turn, decreases the amount of time spent pushing the clutch pedal and takes the guesswork out of determining the clutch engagement point. Homemade clutch stops are easily fabricated using a few common pieces of hardware. Ron Stygar has detailed instructions on how to create a clutch stop or you can purchase his unique design at http://www.unofficialbmw.com/all/drivetrain/all_clutch_stop_adjustment.html.
Q. Why does my clutch pedal squeak and why is it sloppy and loose?
A. The creaking noise when depressing the clutch pedal is caused by a spring. Generally, a quick shot of lubricant will suppress the noise for a bit until it dries out again. The lateral movement (loose feeling) is caused by worn bushings. Ron Stygar's solution and UUC Motorwerks provide unique methods to significantly reduce or eliminate the clutch pedal play and noise.
Q. Which companies manufacturer the M3 transmissions?
A. There are two manufacturers and both are German. Getrag produces the European six speed manual gearbox and Zahnradfabrik Friedrichshafen (commonly abbreviated ZF) produces the US five speed manual and automatic transmissions.