Gen 3 rear end screech sound

[jhill15]

I have recently aquired a horrible screech sound coming from my rear end...."I just went back and read how this sounds lol" anywho, it only happens during take off when I depress the brakes and is coming from both sides. I recently had both diff and t case oil changed, I checked my rear brakes they seem to be fine...from the outside at least, I havent had time to pull my tires off to see if the inside of the pads are worn to metal.

I googled and googled to see if could find anyone who may have had the same issue...tough luck though.

Has anyone on here had the same issue or could give some advice as to what to look at that could cause such a horrible sound.
I guess my worst fear would be that my diff is going to fail on me. But I would like to not have to take it to the dealer, they always give me the shot in the dark "well its this"... $400 later, well...

Thanks in advance

 

[Monstero]

Rock could be wedged in dust shield or along rotor....Jack up each side and wiggle to if there is play....If there is it means wheel bearing.

 

[jhill15]

I do live on a gravel road so a rock lodged in there is a possibility.

Im gonna jack it up in the morning and pull the wheels off. If i have enough time i will make vid of the noise as well.
Thanks monstero

 

[jeep-N-montero]

Yeah, takes about 6-8 minutes per side to pull the wheels off to check the pads and bearings, should save you a trip to the stealership.

 

[jhill15]

Thanks jeep-n-montero hopefully the brakes are the culprit, I have my fingers X'd, thats something I can tackle on the weekend with minimal expense.

 

[jhill15]

I jacked up both sides and brake pads seem to be fine. Im stumped. I forgot to add that the noisr is coming from both sides not just the driver side thats in the video. Also the screech doesnt occur if I just ease the pedal just when I give it gas and take off quick.

Heres a vid of what it sounds like


Montero rear screech: http://youtu.be/-a4d8K3-EZU

 

[jeep-N-montero]

So once you are moving along the noise goes away? Might be a bushing or bolt that moves when under braking or acceleration torque.

 

[jhill15]

Yeah it goes away after I start moving. As far as a bolt moving under pressure would that be something I just get under there and start torque'n away on bolts?

 

[jeep-N-montero]

If it were brake, hub, or differential related the sound would most likely continue beyond just starting and stopping, and given the video it seems that it could be a bushing or bolt. It couldn't hurt to get under there and check your bolts. Did you do any suspension work since you bought it?

 

[jhill15]

Nah I havent had any suspension work done, although it could use some new shocks and struts im pretty sure they are from the factory. I will climb under there and see if I cant find any loose bolts or bushings.

Thanks man!

 

[nckwltn]

it looks like something you should be able to recreate by lifting one wheel up and spinning by hand. coming from both sides at the same time is really strange. One thing you might try would be to turn the steering wheel hard one way and see if you can get the noise to replicate. with the wheel turned hard, the outside tire is going to be turning much faster, inside much slower.

Also, I assume the e-brake is a drum style inside the rear rotor (I don't know for sure, just guessing) so it might be something jammed inside your ebrake shoes

 

[jhill15]

Thats a good idea nckwltn on trying to replicate it with the wheel turned all the way. I will most certainly try it and see what happens.

To be honest im not sure where the ebrake is lol. I didnt see a drum comming off the back of the t case. But thats a possibility of something being jammed in the shoe.

 

[Monstero]

It could be in the ebrake shoe area...you will have to take off the rear calipers which have the two bolts that hold them to the axle. Then you can set it up outta the way and then will be able to pull the rotor off and inspect the shoes in behind them. You may need to use a hammer to hit around the lug nuts to break it free from the rust in that area. Then it will slide right off.

 

[jhill15]

I was just talking to my dad and he was saying the same thing about taking the calipers off and looking behind the rotors to see if the was any metal rubbing. I will have to look more into it this weekend as I have to work the rest of the week.

 

[jhill15]

I stopped by the dealer today and had the service techs take a look at it and they think its my ebrake pads...but said not to rule out my rear drive shaft...but I would think that if it were my rear drive shaft it would make a constant screech.