I'm experiencing a noise from my rear axle. Its intermittent and only
audible in at slow speed in 1st/2nd gear. If I'm rolling slowly down a hill
with the clutch in (engine disengaged from transmission) theres no noise at
all. If I lift the clutch slowly to engage engine the noise appears. It
only occurs under light load, either accelerating or decellerating and if I
try to create a no load situation by being careful with the accelerator I
can effectively make the noise disappear for a moment. The noise I get is
obviously coming from something thats rotating and the frequency of the
noise is proportional to the wheel speed. It sounds like a grinding,
knocking type sound. The car otherwise drives fine.
Any thoughts from any of you who are experienced with this problem?
The car is a 2000 E46 330D