07 GT E UPP

Hey JDK....I don't think you've answered the question yet...did they, or you, put in any "Friction Modifier"..??

Norm Peterson

I doubt that friction modifier is the problem.

Friction modifier is normally used to make the diff operate smoother (i.e. eliminate chatter) when the two rear wheels need to be turning at different speeds. When you're driving in a straight line, there is no differential action going on so there's no chatter even trying to happen. Assuming that you don't have different size rear tires, anyway.


Norm

jkd12589

Yes I put in friction modifier. Jiffy lube probably didn't. After I changed the bearings, I only drove the car long enough to hear the noise again. Would it take a while for the friction modifier to quite the noise ?

jkd12589

I did with this change. Not sure if it was in the last one.

charliebrown266

Did you just change the outer bearings? Or did you change the inner bearings and pinion bearing too?

jkd12589

Just the outer bearing. The mechanic said the noise is coming from the outer bearing only. I guess I should just bring it to the dealer. I just hate going there.

jwharton

After I put my friction modifier in, I went to an empty parking lot and did some slow figure 8's to get it worked into the components. After several 8's it got better.