I have a 02 f150 fx4 crew can with 3.55 gears. For about the past week I have noticed a loud squealing/chirping noise from the rear. Thought it could be a wheel bearing and replaced the driver rear wheel bearing. Also some times when I turn it feels like some is grabbing. I'm getting pretty frustrated with it and need to figure this thing out. Any help is greatly appreciated.

 

Check your rear brakes and the parking brake shoes.

 

That was the first thing I checked. What about a bad u joint??

 

So what did you use for rear gear fluid?

 

Long shot here but do you have a limited slip in the rear?.....friction modifier could of worn down and that thing could be chirping...hard to say without hearing/seeing it though...

 

He did the wheel bearings, -so, the fluid was changed. But yea, the fluid could have been broken down before hand. Then once replaced, he may have used the wrong stuff or forgot the modifier.

 

Lets hope the fluid was changed and that modifier was used