: Rear diff growl



Jayfrigginjones
10-23-12, 07:05 PM
Since the weather is getting cool, I've noticed a groaning from the diff when turning. It only happens in the morning when the car is cold so im not worried.

Anybody else experience this?

Jay

dennych
10-23-12, 07:57 PM
Sounds like lots of rear diff issues with these... I guess people say have the rear diff fluid checked?

smackdownCTSV
10-23-12, 08:43 PM
Nothing new, there is a TSB for that.

dennych
10-23-12, 09:08 PM
http://www.cadillacforums.com/forums/2009-cadillac-cts-v-general-discussion/237235-2009-cts-v-tsb-sticky-thread.html

This one?

smackdownCTSV
10-23-12, 09:18 PM
Yeppers!

Jayfrigginjones
10-24-12, 08:00 AM
Oh snap! Thanks for the info.


Jay

thebigjimsho
10-24-12, 01:23 PM
Since the weather is getting cool, I've noticed a groaning from the diff when turning. It only happens in the morning when the car is cold so im not worried.

Anybody else experience this?

Jay

Change the fluid AND MAKE SURE they add friction modifier for limited slip differentials...

Jayfrigginjones
10-24-12, 06:00 PM
I just rolled over 40k miles. Will this still be covered?

thebigjimsho
10-24-12, 06:47 PM
Yes.

cts-v ls6
10-24-12, 07:46 PM
I just went through this with my 2010 V2, so here's the deal. My dealer changed the fluid out 3 times. The noise, vibration and groaning persisted. It increased from when I backed out of the garage in the morning to also include while I was driving straight down the highway. The 3rd time I had the fluid changed was at 70K miles. I pointed out that I had documented the failure of the fluid change to cure the problem BEFORE the 50k warranty ran out (apparently the rear end is not considered part of the power train and not under the 100K mileage warranty?) So when I went in at 77K miles with it groaning all the time, I also brought with me multiple printouts from this website on the rear end issues others have had, and how Cadillac stood behind them and gave them a complete new rear end.

Bingo! I got a new rear end at 77K miles at no charge. And it's smooth and quiet. With the 6 sp manual shifter replacement at about 45K miles, she runs like a new one.

Jack

Xaqtly
10-24-12, 07:48 PM
Why did you need your 6MT replaced? Just curious as to what the issue was.

cts-v ls6
10-26-12, 08:55 AM
They didn't replace the 6 sp, they replaced the 6 sp shifter. I believe there is a TSB on the replacement, as some manual cars had issues. My car's issue was that it was very difficult to put in gear and very difficult to shift, especially 1-2 and 2-3.

But it's smooth as silk now.

Jack