help with mystery drone

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Joined
May 19, 2010
Threads
11
Messages
38
Car: '04 100 with 150k.


It has a hum/drone at speed, anything over 20 mph. It gets louder when I back off the accelerator. Local stealer said repacking the bearings should resolve the drone and I went ahead and OK'd it after they confirmed the bearings look good. Then 2 miles into my drive home, the drone came back. I called the dealer and the SA said "Oh we'll probably need to replace the inner and outer bearings then." Another $420.


My fear now is, is this actually a wheel bearing issue? All the indicators on mud point to rear drive shaft or the u-joint.


Second question, since the stealer was already in there and had the opportunity to replace the bearings and now has to go in again, isn’t that considered double dipping on the labor? Are there any data points for having inner and outer bearings replaced at the dealer?
 
In my searches on MUD while chasing my minor droning issue, I don't think anyone has solved it with wheel bearings. Unless that SA knows something that the collective wisdom here doesn't, I'd skip the new bearings and just be happy with the re-pack. The drone is much more likely to be u-joints or exhaust related. As an aside, if the dealer did go in again to replace the bearings, I would hope there would be no labor charge, since they didn't get it right the first time.
 
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