Weird Noise from rear end

[alamantia]

I heard of torsens making "a rusty screw noise" which is cured by the GM additive. What was done to the rear, just a fluid and gasket change??

[wzup1000]

Whenever I make a sharp turn at around 5-10 mph I hear this weird wahh-wahh.... then it will pause about half way into the turn, and at the very end right before I straighten up it will make the same wahhh-wahhh noise.

I didnt notice the noise before I got the diff. fluid changed, but afterwards I noticed it.... to make a long story short I took it to the chevrolet house and they said (from the reciept) that I seems to be the right fluid, but should I be concerned???

any help would be great

[wzup1000]

I just had the diff fluid changed at a quickie lube place... they probably didnt know what they were doing. My car only has 35000 miles on it, that is why I am concerned.
Luckily I have a GM warranty that covers my entire drivetrain. Im just asking because I would like to have it changed before the warranty expires.

[alamantia]

Romove the plastic vent in th etop of th erear and squeeze a bottle of the GM dif additive through the hole. Replace the plastic vent and see what happens.

[nc98z]

make that 2 bottles