zhodges13

I have a "grinding" noise coming from beneath my jeep.

It only makes the sound after driving for at least 30-45 minutes straight and a speed of at least 40mph. I hear it a tiny little bit driving straight but majorly when turning. After i park and let it sit for a bit it goes away.

Can anyone help me with this?

Zach

Big David

Could be brakes or a zillion other things.Get under there & start looking for shiney metal.You could also take somewhere that offers free inspections.Just make sure it is really free,not "free inspection with any purchase" scam.

BatmanXJ

Need more info. If you havent crawled under and done any type if inspection u should do that first, and report back.

XJRed96

u joints, wheel bearings, differentials, brakes. is the noise rotational/ cyclical? does weather or temp have any relavence? does it happen all the time? any modifications like lift or bigger tires? local driving or hwy? noise from front or rear or even driver vs pass side?

zhodges13

i recently had u joints replaced so its not them. it happens all the time when i travel on highways for at least 30 minutes straight. everything is stock right now.i am pretty sure the noise is coming from the front. maybe the front left?

XJRed96

it might be a dragging brake caliper that is not releasing. pull tires off and inspect the brakes... would be a good idea to service them. as well... Chrysler products like to develop large rust pits on the knuckles where the pads ride. be sure that the pads can move freely, that the slides are moving and regrease those. and make sure the caliper piston retracts. may also be a good idea while you are in there to inspect the condition and level of the front diff fluid. have all u-joints been replace because there are front axle u joints... although I'm not sure if your jeep has the u's or the cv joints. either way get in there start eliminating some possibilities and we will keep moving forward.

zhodges13

i was pretty sure it was my wheel bearing so i replaced it.

Pelican

That fixed it?

XJRed96

x2?

zhodges13

yeah i havent heard the noise since i replaced it.

zhodges13

I replaced my bearing and the noise is still occurring. Happens now highway and local driving. Noise comes into effect after driving for 15-20 minutes. I had a friend look at the ottom and said nothing looked out of the ordinary. Any other ideas what it could be.