I have a mystery noise and for the life of me I can't figure out what is causing it.

 

It only does it after I have been driving for a few miles. When it's cold there is no noise. Its coming from the passenger rear. It sounds like a thunk thunk thunk, while driving straight, as soon as I turn the noise changes to a grinding sound. When I put it into 4wd the noise stops. It's louder while decerating.

 

I have pulled the wheel off and the drum looked at the brakes... everything looks fine.

 

Could this be an axle or wheel bearing?

 

It's on a 88 GL w/ 235k

Did you check and see if the wheel moved when grabbed at the top and bottom?

Drive shaft?

Johnson']Drive shaft?

 

Good idea, could be U-joint on it's way out.

Good ideas! Keep them coming!

Hi This is Jerry, your noise is a loose lug nut. It happen to me please check them. Thanks Jerry

Check your rear diff oil?

good call on the lug nut, my wife had a wheel fall off after a certain large tire shop changed the tires. if the noise changes very dramatically like that it prob is lug nut. I find most thunks are axles, and most grinds are bearings though if those lugs are tight.

could be a bone dry bearing. check them cuz i had the same exact sound and it was a dry bearing. the solution to that is simply repack and ur good to go.

could be a bone dry bearing. check them cuz i had the same exact sound and it was a dry bearing. the solution to that is simply repack and ur good to go.

 

That's what I think I had one go out in eastern Wa and drove all the way home with a thump thump thump. sounds just like what I had going on.

 

Jeff

I think I'm leaning toward the bearing idea. The lug nuts are tight and so is the castle nut (those where the first things I checked)

 

Just a repack or should I replace the bearing?

Pull the bearings out and check to see if there's any discoloration or marks on them. If there is, replace but if not, repack and try it again. Basically a bearing pack is labor but the bearing replacement is kinda expensive. Did it on my RX and the bearing retailed at like $120:eek: