I am hearing what sounds like a wobbling noise coming from the rear of the car. It starts at about 30mph as i go faster so does it. Here is what i have done

1. Replaced Rear Wheel bearings
2. Replaced Rear Diff and installed mustache bar and solid bushings
3. Replaced both carrier bearings and bushings
4. swapped rims and tires

After all that I am still getting the noise. Only thing back there that is left are the axles and rotors. The boots are not torn on the axles but I am now wondering if they could go bad in other ways. The rotors and pads have about 6k on the and are not warped. I am not sure if an axle can go bad with out the boot being ripped but i am at a lost as to what I should try next.

 

Is it just a noise or do you feel any shaking along with it?

 

Just a noise at the moment....very loud and noticeable.

 

Does it sound centralized or coming from one side? And does it seem like the sound is traveling to the front via the driveshaft or not?

I'd start with the easy stuff first before throwing parts at it. Double check the axle nut (the one with the cotter pin) is tight on both sides. Make sure your rear brakes aren't dragging or have something caught in them (like a pebble) that could drag along the rotor.

Best way to really take a look at it is to jack up all four, start the car, and spin the wheels. Have a friend listen for where the sound is exactly coming from and go from there.

 

I have done all that. I put it on the lift and went through the gears. Seems to happen more so when there is load on the tires. I plan to check the pads and calipers tonight.

The sound seems very center from inside the car. Does not sound like left or right but you can tell it is from the rear.

 

Maybe move tires front to back to see if the sound moves. I had big racket coming from the front. Last fall I had the front axles out and played with the wheel bearings to see which was bad. Nothing found. Come winter new rims and snow tires went on. Noise gone.

 

I have swapped tired completely and noise still there.

 

Could you describe it as a whine? It could be the transfer case making whatever noise it is and then the noise travels through the driveshaft.

 

It is not a whine. I had the T-Case whine and I am 100% sure this is not that noise. I will grab a video on the way home with the noise.