Please help me diagnosis this sound.

Truck is a 09 4.0l 4x4 with 120k. It started making this sound subtly a little over a week ago, now it’s all the time. It only makes it when in drive; it doesn’t make it if I give the littlest amount of throttle tho. The heavier the throttle, the fast the squeak. In the video you can tell at the end when I give it heavy gas. I’m taking it in tomorrow and would really like to avoid at $144 diagnostic fee…

https://imgur.com/a/ldElWwX

 

Sounds like a bad U-Joint.

 

I read that somewhere originally, but the dudes description of the noise was off from mine.

 

I thought u joint as well. Dry spot, a weak point of the lubed joints that shipped with the trucks.

Easy way to diag it is to put into park, and rock it back and forth with your hand on the joint to see if it creeks.

If you do end up finding out what it is, please share.

 

Everytime I've heard that sound on a truck it was a stiff U-Joint.

 

Definitely sounds like a U-Joint or possibly something in the brakes.

 

I agree...U joint...

 

Could be a rock in brake pad. Does it do it in reverse?

 

Maybe a bad carrier bearing. sqeaky rubber boot?

You can take out the driveshaft in 20 minutes and be sure it's the rear driveshaft or not.

Probably need new ujoints and carrier.

 

Only in drive.

 

UPDATE.
They’re recommending new axle shafts and a rebuild on the drive shaft including u joints. $2668

Tech believes the noise is from axle shafts and slight vibration is from u joints.

thoughts?

 

I don't think it's CV shafts, they typically make a clicking sound when they go. I'd bet ujoints will fix the noise and vibration.

 

Front axle shafts are vibrating very badly

That’s the tech notes for the cv shafts. Seemed odd to me.

 

If its driveline you will be able to see rust coming out of the ujoints

 

Id remove and replace the U joints, and THEN see whats up...that squeak is NOT the CV Joints..unless theyre leaking and slinging grease everywhere, and completely dry now, but my truck was making that exact squeak, and it was the U joints.

 

This.

 

Also said they sub let the service because they can’t balance the driveshaft after doing u joints.

 

I would find a different shop! You should not have to rebalance the shaft when just replacing U-Joints.