In Reply to: one idea posted by mike on April 08, 1999 at 08:14:57:
My 1989 535I, 123k miles, manual transmission has the same problem. It happens in prolong stop and go traffic or after freeway driving with a little stop and go. I also suspected the center bearing
or maybe the parking brake cable is in the vicinity of the drive shaft and as the car heats
up, all the components expand just enough to cause the drastic noise. Lets all brainstorm and
figure this out.