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I recently installed some new bearings in the rear end.. I followed the assembly manual, using the factory shims in the correct places and torqued everything down as specified.. the car makes no noise while accelerating or going slowly.. or while decellerating.. however, I noticed a high pitch sound while going about 45 mph and higher and a constant speed... its like the sound that is produced when you run your finger around the rim of a crystal glass.. a high pitch hum...
if I push the clutch pedal in at that time it instantly goes away.. I think its related to the rear end since I just installed the new gears but I can verify the sound is comming from there..