If you're serious about fixing the rear differential problems

[BowenCT]

I'm in. First diff replaced at 5k.......2nd is howling like a dog at the moon w/ 7700......

[ace996]

Originally Posted by Luna.

Don't go ballistic here, but...

I know of one person (Joey) who had issues with the '06 differential, but is that the only case? Might that specific differential just be a bad one?

I have had high hopes related to the '06 differential for a little while now & hoped that it would be at least a DECENT answer. Clearly, not the best or anything, but at least a livable one.

My '06 whines and clunks real bad...

[ace996]

Originally Posted by heavymetals

Not interested, but good luck.

[heavymetals]

I am not interested in signing up for any "class action suit".
I have nothing to sue over.
My diff failed (cracked and leaking), was replaced under warranty, and it didn't cost me a nickel.

What I would be up to is notifying the DOT/NTSB that a substandard part has been used. The manufacturer of both the car and the part are aware of same and have done nothing (recall/inspection) for the vehicles affected, except service (and in some cases with a lot of hassle) or replace with the same substandard part.
The part has been "upgraded" in 06 models.
I think there is a big window of opportunity here because the "upgraded" diff is now the standard replacement.

The NTSB can ask them to correct, order them to correct, or do nothing.
I say use taxpayer money if your gonna make a stink.

My $.02

[Mat347]

Originally Posted by crowan

Defining "the solution" in a cogent, concise manner will be necessary but that may be more difficult than it seems because I sense that there is a broad range of expectations about what solution would be satisfactory. Is there a concensus on what the solution should be?
CR

Since Getrag, who supplies our rears, has supposedly told GM that the rears would not handle the LS6/LS2's power. I believe I would be satisfied with a rear where Getrag, not GM, says will handle the power and weight of the V. I believe the '06 rears are just rated marginally higher than the '04/'05. This step in the right direction is good, but apparently it was not a large enough stride since the '06s have been reported breaking/howling. I'm not asking for a rear that will handle 14psi + Nitrous...I just want one that is engineered for the vehicles we purchased.

EDIT: Just out of curiosity I checked out Getrag's site. They have the rearends they sell to GM listed. Corvette gets their type 625 which is rated to 550 Nm, our Vs get type 645 which is rated to 420 Nm. Converted to lbft this is 405.66 and 309.78 respectively. It looks like GM dug their own grave by using a VERY under rated rearend! I would be happy with what the Vette got, which is what we should have gotten to begin with!!!

[LV_V]

WTF is wrong with GM that they use this diff from Getrag that is substandard for the power/weight of the V??? Why would they do this in the first place; they must have known that this problem would arise by making such a mistake. Now that they see all these diffs failing, why do they simply change the part from Getrag to another substandard (though slightly upgraded) rear diff?? Makes no sense from a business stand point, let alone a car manufacturer's responsibility to customer safety. Its bull$hit, we all know it, they (GM) knows it, yet nothing is done about it.

I really hope someone gets the ball rolling on this. If I had the resources, I would no doubt do it. My thanks goes out to those investing their time and more into the resolution of this issue.

[CVP33]

I was hoping that someone would step up and provide the web space for the data base. Each of you will find a very aggressive GM sitting on the other end of a lemon law or buyback claim. It will help you immensely if you have a data base of all failures so that you can offer proof that you are not alone and that your vehicle is not the "one in 7,000" that GM has had a problem with. It would also help you to have the letter from Mr. Deal at GETRAG confirming the specs of the V's differential. Finally, sighting the improvements made to the '06 differential and transmission will again prove useful.

As of 6:30 pm I no longer have a dog in this fight, but will be happy to supply my VIN and repair history as evidence for someone else. Please don't bother to PM me as I will not share my story until ALL the smoke has cleared. If I were a current original owner of a 2004 or 2005 CTS-V I would be mad as hell and would not allow GM to hide behind an inferior piece of equipment. I for one am glad to be over it.

[heavymetals]

Originally Posted by LV_V

WTF is wrong with GM that they use this diff from Getrag that is substandard for the power/weight of the V??? Why would they do this in the first place; they must have known that this problem would arise by making such a mistake. Now that they see all these diffs failing, why do they simply change the part from Getrag to another substandard (though slightly upgraded) rear diff?? Makes no sense from a business stand point, let alone a car manufacturer's responsibility to customer safety. Its bull$hit, we all know it, they (GM) knows it, yet nothing is done about it.

I don't wish for it, but in this "squeaky wheel" corp world the only thing that gets immediate action is loss or potential loss of life.
I guess a rear end failure just doesn't pose that much potential risk for GM.
I hope they fired everybody who defended using the stock CTS rear, but sadly I bet a few got bonuses.

OT: Funny you should mention "lemon law".
It was a relative of mine (I am told) that helped with that law.
http://www.lemonlawca.com/songbeverly.html

[Jurisimprudence]

If you want to play "hardball," you don't need all of the data at this point. If you proceed legally, you can request that GM provide all of this data for you as part of your discovery request. Not only does that get you the information that you want, it also makes them do the leg work and allows you to publish this information if you'd like. I suspect that GM would be more concerned with the bad press than they would with the cost of replacing the rear end in a couple of thousand cars. In fact, if it were me, I'd also ask how much they've spent on all the advertising that they have been doing for the "V" series of cars. Hell, they'll probably have a commercial on the Super Bowl tomorrow. If so, the cost of the 30 second commercial would have probably paid for all the R&D, labor and parts to replace everyone of the rears in the '04s and '05s.

[lasstss]

I sent every pic of a broken case Get Rag that was submitted to the forum toGetrag..They know this Diff is under rated but they are under contract with GM. They also informed me that a better rear could have been supplied. I believe that GM thought they could get away with enemic peice with the traction control in charge. Wrong assumption!

Another funny one is Jon Veith...Jon Vieth [jv@ttcautomotive.com] at Tremec. Lots of front end replies. When I sent him copies of complaints, he clammed up..

[heavymetals]

Originally Posted by lasstss

I sent every pic of a broken case Get Rag that was submitted to the forum toGetrag..They know this Diff is under rated but they are under contract with GM. They also informed me that a better rear could have been supplied. I believe that GM thought they could get away with enemic peice with the traction control in charge. Wrong assumption!

Another funny one is Jon Veith...Jon Vieth [jv@ttcautomotive.com] at Tremec. Lots of front end replies. When I sent him copies of complaints, he clammed up..

If you want to persue the "nuclear option" I suggest you resend the info to the NTSB, and your congress person.

Furthermore, if you do go to http://www.nhtsa.dot.gov/ you will find there are only three complaints, although multiple failures are reported.

A good start would be for everyone who had the diff replaced to enter in all the data there.

There already is a data base, government sponsored even.

If your real lazy here is a phone # 1-888-DASH-2-DOT
(1-888-327-4236)
I recommend that you enter the data on the site though.

[lasstss]

Originally Posted by heavymetals

If you want to persue the "nuclear option" I suggest you resend the info to the NTSB, and your congress person.

Furthermore, if you do go to http://www.nhtsa.dot.gov/ you will find there are only three complaints, although multiple failures are reported.

A good start would be for everyone who had the diff replaced to enter in all the data there.

There already is a data base, government sponsored even.

If your real lazy here is a phone # 1-888-DASH-2-DOT
(1-888-327-4236)
I recommend that you enter the data on the site though.

I did that very early on, mine had not failed yet but I did fill out the info.

[heavymetals]

Originally Posted by lasstss

I did that very early on, mine had not failed yet but I did fill out the info.

Well now we will see how serious it gets.

I expect the # of reports to at least multiply X 4!

Use your taxpayer dollar!

[Florian]

submitted....


F

[wildwhl]

Heavy -

I've tried multiple times to submit a complaint here. For whatever reason, I cannot whether it be from my Mac or IBM based laptops, at different IP locations

I'll blow my diff to pieces with N20 ultimately anyway - but I still feel the product is inferior, and that if we didn't have this problem, my V would be worth substantially more $$$ today than it is - because we would not all be complaining/afraid of the failure(s).