I think my ZL1 has this problem. I just didn't know what the hell it was.

Don't know when the bulletin came out or whether my dealer did all that, but they pulled it apart to check it last year and refilled it and mine has been fine since. Basically what this guy said.

I just came back from my dealer and cant believe they were going to put the wrong fluid in the car. The tech looked at me like "who the hell is this guy" I told him that this car uses a fluid from gm with the additive already in the car. He went to parts and came back with the right stuff.

When filling he used 2 bottles/quarts of the fluid and pumped it in then I reminded him that in needs 2.1 and he again went and got another bottle and pumped in about 1/2. Some fluid came out and we watched it drain from the fill plug and closed it up when it started to drip.

Makes me thank this forum and its memebers for the insight and info. I pray this guy torqed the bolts right.

Now that I think about it i hope he cant overfill the thing........

I wish the dealer would change mine. Since the TSB says not for ZL1 they wont. guess I will guy buy the stuff and do it myself soon.

There is a new one specifically for the ZL1. Anyone have it?

my dealer said the same but next oil change ill try again

so, what is the correct oil to use

GM LS gear oil is the correct gear oil for the rear. http://www.gmpartsdirect.com/results...umber=88862624

additive already in bottle.

subscribed

my diff isn't making any noise as of yet. although my car only has 1500 miles so we'll see what happens.

Mine already started whining :facepalm:

Ahmad

Dealer drove mine and the write up says it is normal. It whines at 65mph when rolling between slight throttle, coasting, and off throttle.

It mainly does it in slow turns, more so in colder weather.

Dumb question so here goes. How does changing the rear end fluid fix this issue? I would think that GM used the same fluid that we can buy from the dealership to do it ourselves.

Does the fluid magically wear out or something that quickly?

My understanding (through three visits to the dealer) is that some of the lashing compound is remaining in there and causing the noise, By flushing it and refilling 3 times along with some figure 8's etc. removes any remnants of the compound. Maybe someone can find the bulletin and publish it here.

Edit: I am trying to get a copy and will post it here.

TSB # #PIP-5097

I thought someone posted this somewhere but cant find it. Ayone have a copy?

EDIT: found it http://www.camaro5.com/forums/showth...light=PIP-5097

I had the same issue, dealership changed the fluid. I still had the issue so they replaced the center section.

Does anyone have the service bulletin # for the chatter?

Awesome, thank you much.