Okay, I have a f150 xlt. V6, 4.2L 5-speed 4x4. When i start it up and start moving around 1500 RPMs it starts squealing. It only squeals if i press on the gas or break on around 1500 RPM (give or take 500 RPM). It doesn't squeal when i press the clutch in at 1500 RPM and it's not the pressing of the breaks that do it. and the emergency brake is off It is coming from my rear end somewhere. The rear differential oil is full, i replaced it last year and double checked it. I have stock wheels.Could it be the driveshaft in some way either being a bearing or gasket or seal or something. Please help

 

What year is the truck and how many miles are on it?

 

are you sure its not the fan belt?

 

it is a year 2000 and has 133,000 miles on it

 

Regular cab or ext. cab? Possibly a carrier bearing? Not really familiar with these trucks yet.

 

it as 8 foot bed. And what is the carrier bearing? And i'm for sure %100 solid that it is coming from the rear end towards the rightish somewhere. I also WD-40'd the hell out of the driveshaft u-joint but, i have not ridden long enough to see if that solved the problem or not. i don't think it had to do with the u-joint at all

 

The carrier bearing is the center support if you have a 2 piece driveshaft.

 

It's either a brake, U-Joint or a carrier bearing...can't think of anything else on the rear end that would squeal.