Quote:
Originally Posted by wrench1
Let the car idle in neutral and see if you have the noise. Then depress the clutch and place in gear, noise gone? If the noise goes away with the car sitting still, in gear and clutch depressed, it's the torque shaft bearings. If no noise sitting still in or out or gear and only with car moving, most likely the rear wheel bearing(s).
If there is no noise either in gear or out of gear, with clutch depressed or engaged you may have lost the pinion shaft bearing or the pinion depth may not have been set incorrectly when the differential was rebuilt.
Hope this helps out.
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This isnt really true. It could still be the throwout bearing because putting pressure on the otherwise free running bearing changes the characteristics of the bearing and how it engages the wear groove causing it to shut up. Only way to know 100% is to pull the tranny and rotate by hand.
Edit; the TO bearing typically stops spinning when the clutch is pressed also but older ones tend to keep spinning regardless