got a 2007 Highlander, rear vibration and hum..dealer replaced driveshaft, differential, and now says it's the transmission radiating the sound/vibration down the drive shaft....still have the hum
Found the problem, besides having a dealer with a poor Service Department......the new rear axle bearing assembly I had installed 1000 miles before was faulty....drove the car at all speeds then put it up on stands and felt the hubs...rear hub was warm on the side the bearing was replace.....bought a Timken bearing assembly, replaced the faulty one, and it drives fine now.....now the place who put the bearing on in the first place won't refund any money to me......saying "they have to do the warranty work on the car to make sure that was the problem"...even tho I let them have my car 1 1/2 days to diagnose the problem.....lazy and arrogant repair place, will stop payment on the check ASAP until we get this straightened out.
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