Please help ASAP

[stanggt2004]

I've been on many forums with this question with many different answers but none seem to fit as a solution to my problem. I have a '04 mustang gt auto; at high rpms on or off the gas when it shifts i hear a squeal in the rear end. I know its not the tires breaking free, so i am leaning towards the gears. What maybe the problem?

Aswell when just crusing at any speed and you give it a shot of gas i hear a big clunk in the rear, which makes me lean towards a bad u-joint, Which i am 90% sure it not a major problem.

So if anyone has an idea what could cause this squeal, info whould be greatly appricated. Thanks.

[chronomafia]

Are you sure it is the rear end? It could be your trans as well. Mine is doing the same thing (87 Mustang) and my overdrive is acting up. Just a thought.

[351wStang]

Check the u-joint. The needle bearings could be bad.