Try swerving back and forth at the speed you hear it pretty well at. This will unload the wheel some. If it goes away or is greatly reduced its a decent chance its a wheel bearing. It could be described as somewhat of a howling noise too.
When one of mine went bad it scared the crap out of me. I was far from home and I had this terrible sound and vibration all over the car. I thought about it possibly being a bearing but since the vibration felt like it was in the tranny I quickly ruled out the thought and was sure it was a drive train issue. Made it to my local shop confident about it being the tranny and having to pay out the ass for a rebuild. Shop owner tells me he's certain it's a bearing and starts wiggling the front wheels. The pass side made a clank as he shook it like something was loose. He replaced it and problem fixed. Learned a good lesson about how bad a worn out bearing can get.
Can be anything from a grinding noise to a screeching noise. Jack up the front of the car. Grab the tires at the top and bottom. Give it a really good shake. Use some muscle. If it moves at all then the bearings are bad. If you grab the tires on the front and back and it moves, then that is bad ball joints. The rears are harder to tell. Usually just bad noises coming from them. GA
It was making a deep wub wub sound from the front like mentioned above. Only did it at low speeds and was getting worse slowly. I put the car up on jacks and removed the brakes. The bearings were making slight cricket or tinny marble sounds when I turned them. They were not loose, but did spin a bit easier than they should. I replaced them both with new Timkens.
Replaced the front hubs and the sound remains without any difference. So now I guess I have some bad rear axle bearings. Any ideas or advice? The sound is only there at low speeds, like less than 25 mph. It gets worse when I turn right and usually goes away when I turn left. Doesn't matter if I'm braking or on the gas. Only varies with speed and direction of turn.
Do you think this is what I need? Or could It be something else? I figure the left turn/right turn test seems to point to the outer left or right bearing in the axle. I'm assuming the other bearings would make noise all the time if they were bad.
Well...it's one of those "while you're in there :idunno: " things. Take your rear calipers off the rotors and measure the axle end-play. If you can pull the axles out more than about 3/16 of an inch, you should consider re-shimming the traction-lok to tighten it back up again and improve its locking action.
You got the right kind of puller, but be forewarned, you'll probably have to hit it so hard with the slide hammer you might think it's going to come off the jackstands.
If the axle is galled you'll have to replace it or use an "axle saver" bearing.
I replaced the rear axle bearings and seals and the sound is still here with no change. I did notice the drivers axle has 1/16 (0.060) inch end play and the passengers axle has 1/32 (0.030) inch end play. Maybe the diff needs to be rebuilt and re-shimmed. Oh, and the axles looked perfect, almost new. They were replaced with 31 spline axles at about 100k miles.
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