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My 2014 M7 developed an odd wobble, most noticeable when going a steady speed and less noticeable when acceleration. It was on an extended warranty until 2 months ago. I took it to the dealer a couple of times before my warranty expired and had them drive it. Amazingly, the service manager drove it and said my clutch was slipping. Later, shop manager drove it and they replaced a bushing in the differential for which there was a TSB. Wobble continued and now it’s worse. I took it to the shop that works on my C3. The owner went for a drive with me and right away he said torque tube. They have done C5 and C6 torque tubes. My C7 will be their first. Should they rebuild it or should they get a new one from GM? I told them they might as well do the clutch since the car has 82,000 miles.
Personal opinion, I would replace the assembly from GM Parts.
GM parts come with a warranty.
I would be concerned with the rebuild, and would always question.
Personally, I would have GM do it using GM parts. If not satisfied with the GM dealer used previously, find another. I owned and operated a chain of auto parts stores for 16 years and both rebuilt and remanufactured parts quality can be inconsistent.
My 2014 M7 developed an odd wobble, most noticeable when going a steady speed and less noticeable when acceleration. It was on an extended warranty until 2 months ago. I took it to the dealer a couple of times before my warranty expired and had them drive it. Amazingly, the service manager drove it and said my clutch was slipping. Later, shop manager drove it and they replaced a bushing in the differential for which there was a TSB. Wobble continued and now it’s worse. I took it to the shop that works on my C3. The owner went for a drive with me and right away he said torque tube. They have done C5 and C6 torque tubes. My C7 will be their first. Should they rebuild it or should they get a new one from GM? I told them they might as well do the clutch since the car has 82,000 miles.
If the problem was present and reported to the dealer while your warranty was in effect I would insist on it being repaired under warranty. Their misdiagnosis is not your fault.
If the problem was present and reported to the dealer while your warranty was in effect I would insist on it being repaired under warranty. Their misdiagnosis is not your fault.
Same thing I was thinking. IF you had a GM warranty it should be covered as they would have it on file that it was a pre-existing issue.
Sorry to hear of your Torque Tube problem. I have a 2014 M7 as well, and I am concerned for an ultimate failure.
The Gen 7 torque tube is made of steel, whereas Gen 5 and 6 were made of aluminum. GM made the change for a number of reasons, but for sure it is stronger than previous generations.
Watch the first 2.5 minutes of the video below. Tadge Juechter explains the reasons for moving from aluminum to steel in Gen 7.
With the torque tube out, it will be a great time to inspect/replace the clutch and pressure plate assembly. After all, the bulk of the labor will be associated with the torque tube repair.
I believe 2015 and later torque tubes had improvement made to the internal components. A little research here may provide a better torque tube assembly.
Personally, I would have GM do it using GM parts. If not satisfied with the GM dealer used previously, find another. I owned and operated a chain of auto parts stores for 16 years and both rebuilt and remanufactured parts quality can be inconsistent.
If the problem was present and reported to the dealer while your warranty was in effect I would insist on it being repaired under warranty. Their misdiagnosis is not your fault.
Good catch True that.At the price of this repair I would be Relentless
A very unfortunate failure of this design.One of the reasons I have a lack of confidence in adding more Horsepower
The weakest link is always there at any time during Playtime.More Horses add's to the odds of Breakage.
Sorry to hear of your Torque Tube problem. I have a 2014 M7 as well, and I am concerned for an ultimate failure.
The Gen 7 torque tube is made of steel, whereas Gen 5 and 6 were made of aluminum. GM made the change for a number of reasons, but for sure it is stronger than previous generations.
Watch the first 2.5 minutes of the video below. Tadge Juechter explains the reasons for moving from aluminum to steel in Gen 7.
With the torque tube out, it will be a great time to inspect/replace the clutch and pressure plate assembly. After all, the bulk of the labor will be associated with the torque tube repair.
I believe 2015 and later torque tubes had improvement made to the internal components. A little research here may provide a better torque tube assembly.
So I just did this on my car. It isn't actually that bad of a job if you have a lift. My recommendation would be to upgrade to the Z06 carbon fiber torque tube. Not only does it save weight, but has a more heat resistant harder durometer coupler that will help prevent this from ever happening again.
Also while in there (if auto) change your riveted flywheel (which can rattle over time) to the upgraded one with nuts. Also a good time to change out the rear main seal (while in there). I also had an axle seal weeping a bit and the rear diff cover weeping, so good time to replace those seals and get everything back to like new condition.
Should they rebuild it or should they get a new one from GM? I told them they might as well do the clutch since the car has 82,000 miles.
I tried getting bearings for my C7 torque tube from Chevy and was told that those parts are unavailable by my local dealer. The entire assembly is all they sell at about $2100. I was able to find the bearings from RPM and will be eliminating the rubber couplers by going with a DSS shaft. So…yes…the torque tube can be rebuilt but you may wanna spec the replacement assembly.
And absolutely replace the clutch. The car will be torn apart and this will be a good time to replace it.
I tried getting bearings for my C7 torque tube from Chevy and was told that those parts are unavailable by my local dealer. The entire assembly is all they sell at about $2100. I was able to find the bearings from RPM and will be eliminating the rubber couplers by going with a DSS shaft. So…yes…the torque tube can be rebuilt but you may wanna spec the replacement assembly.
And absolutely replace the clutch. The car will be torn apart and this will be a good time to replace it.
What replacereplacement clutch are you considering ?
Can’t help you with that one. I have an automatic. With a little searching you should be able to come up with a good suggestion. Many on here have replaced them.
My 2014 M7 developed an odd wobble, most noticeable when going a steady speed and less noticeable when acceleration. It was on an extended warranty until 2 months ago. I took it to the dealer a couple of times before my warranty expired and had them drive it. Amazingly, the service manager drove it and said my clutch was slipping. Later, shop manager drove it and they replaced a bushing in the differential for which there was a TSB. Wobble continued and now it’s worse. I took it to the shop that works on my C3. The owner went for a drive with me and right away he said torque tube. They have done C5 and C6 torque tubes. My C7 will be their first. Should they rebuild it or should they get a new one from GM? I told them they might as well do the clutch since the car has 82,000 miles.
Good luck finding one from GM. I was told they are on a nationwide backorder and no timeframe of when they will be available. Amazing considering the TT is a common issue with the C7’s. My 2018 C7 only had 7500 miles on it when the sound first started a few months ago.
Torque tube going
True that.At the price of this repair I would be Relentless 
