[TheDarkKnight]

I have recently bought a 2000 GT! The car is great but there is one problem. There is a loud grinding, whinnying, annoying sound coming from the rear end... I think it might be the differential but can anybody tell me what it is for sure? Thanks guys

 

[1996mustang]

Id bet it may be the diff making the noise. One way to check is lift the rear on jack stands and spin the wheels to listen to grinding.

 

[1slosix]

i'd flush the old fluid out and check with a magnet for metal shavings..most likely the teeth are ground down.

 

[cliffyk]

i'd flush the old fluid out and check with a magnet for metal shavings..most likely the teeth are ground down.

You don't have to check with a magnet--to get the fluid out you need to pull the differential housing cover so just take a look and see what you can see...

 

[96NYCGT]

I thought it was my differential too until I lifted up and check it was my Differential damper Which I just removed

 

[cliffyk]

I thought it was my differential too until I lifted up and check it was my Differential damper Which I just removed

It is very unlikely that the differential damper ("dogbone") would cause the noises the OP describes--very unlikely...

 

[1996mustang]

It is very unlikely that the differential damper ("dogbone") would cause the noises the OP describes--very unlikely...

+1 the nvh wouldnt make a grinding whining sound since its only a damper. the op describes possible differential with no oil in it, or worst case scenario, like obama said its time for a change, differentials that is.

 

[Mfore33]

Mine did this and it was the carrier bearing going out.

 

[TheDarkKnight]

Thanks for the tips everyone! I'm gonna get to the bottom of if soon... I really appreciate the help