: Another differential replacement.....



mrk4543
09-27-12, 07:35 PM
Took the V into local dealer and asked them to check for a
'dry bearing' sound coming from the right rear of the car. (I asked this to be done several months ago but they couldn't replicate). Anyway, the tech finally heard the noise and ordered a new rear hub for the left rear side....Service writer called today...not the hub but the differential. They ordered a new one and car should be ready tomorrow.

The car is still a totally stock automatic car still under warranty, 16,000 miles and 14 months old....first diff was replaced last January at 5,400 miles. Rather frustrating....car is not abused whatsoever....going to try to find out exactly what failed in the diff......

smackdownCTSV
09-27-12, 08:15 PM
That sucks, been there before. But did they change the oil in the diff they replaced?

mrk4543
09-28-12, 09:30 AM
To my knowledge, no.

Cadillac Cust Svc
09-28-12, 02:10 PM
Hey mrk4543,

We hope that all goes well with the replacement of the differential. If there's anything you would like for us to check into, please don't hesitate to contact us via either private message or by email at katie_lucille@gmexpert.com (include your name, contact information, and the last 8 of your VIN).

Sarah (Assisting Katie), Cadillac Customer Service

mrk4543
09-29-12, 09:39 AM
The initial diagnosis from the dealer was a bearing in the left rear hub....they replaced that and the noise was still there (I was hearing the noise from the right rear side of the car but what do I know). Replacing the left hub didn't cure the problem so then they decided it was the diff again. It was replaced and noise is gone. I am trying to find out what is causing the problem...no reply yet. When the first diff went south, I found out somewhere, and I can't locate the thread, that some of the cars were produced between January, 2011 and March, 2011 were the problem children as the supplier had a problem. Supposedly, after those dates, there were no issues.

smackdownCTSV
09-29-12, 09:50 AM
Not likely. These diff's are at a warehouse collecting dust. So they are probably the same ones that were installed in 2010 and 2011. Supposedly the problem is the oil level/lack of additive.

Buzduz74
10-01-12, 03:53 PM
Had 3 new full rears and bearings put in my 2009 !!!!!!!!!! Now have a 2013 V Wagon I guess I love punishment

mrk4543
10-01-12, 04:03 PM
Hey there Buzzman....I wrote to Cadillac Customer Service about this issue. Wonder what the reply will be? By the way, I am the one that wrote to you on FB about your driver's license #...small world, eh?

Marty

1997BlackETC
10-01-12, 04:18 PM
Maybe these Diff's are just under engineered for the 556hp and torque of the V? I'm starting to wonder. The 2012 I had had noise that was progressively getting worse with low mileage. It was starting to remind me of some of the older cars I use to drive with over 100k miles that made noises like this. I never abused the car at all either. I'm just hopeful the 2013 I have on order does not make noise. The first 1000 miles or so my 2012 was quiet, but after that it got worse and worse. I had the dealer change the oil around 2000 miles or so, but it did nothing in quieting down the noise. The oil level was fine in the original fill, we checked it first, so I know that was not the problem.

mrk4543
10-01-12, 04:28 PM
I wish I could find the original link that I posted on....I think it had the TSB number in it....when the noise first became real annoying in mine, the first time, the car had about 5,000 miles. I printed out the forum comments and took them and the car to the dealer...they could hear the whine. First they thought it was the tires, then a hub...after four days of screwing around with it, they determined that it was the diff. Replaced same and it has been fine...until now.

Try a search on the forum and see what you can find....gotta be the differential. For what it is worth, my car is a 2011, automatic and has never been abused....

Marty

allinmyhead
10-01-12, 06:31 PM
Ugh, not excited to hear this. Just had mine replaced at 5300 miles. Stock - auto.

teacherj
10-11-12, 03:12 PM
Have had my 2012 V diff replaced twice. First go round at 3K km and second at 17K km, that's about 2k mi and 11K mi. Anyone know what is going on with these? Car has never been driven hard at all. Dealer(s) don't seem to care at all, just swap it out. No response to my inquiries.

dons
10-11-12, 06:59 PM
Took the V into local dealer and asked them to check for a
'dry bearing' sound coming from the right rear of the car. (I asked this to be done several months ago but they couldn't replicate). Anyway, the tech finally heard the noise and ordered a new rear hub for the left rear side....Service writer called today...not the hub but the differential. They ordered a new one and car should be ready tomorrow.

The car is still a totally stock automatic car still under warranty, 16,000 miles and 14 months old....first diff was replaced last January at 5,400 miles. Rather frustrating....car is not abused whatsoever....going to try to find out exactly what failed in the diff......

I had a 2009 CTS v and raced it all of the time with no rear end problems at all. Sold it and just recently purchased a 2011 V coupe with 15,000 miles on it. When I test drove it I noticed a noise I thought was just road noise from the tires. I have driven it around 2,000 since purchase and just recently installed new tires, thinking that would solve the noise. But I was wrong, as noise continued, so took it to Cadillac dealer two days ago, and got it back today with a new differential.

dennych
10-11-12, 08:55 PM
Interesting....

I sure hope they find a more robust solution than just replacing it in the future. Giving me second thoughts about pulling the trigger as it seems to be a fundamental problem shared by most people. I find it odd I never read about this in Car and Driver's long term test which went up to 40k miles