Hi all. I'm a current C5 owner looking to step up to a C7. I've read an awful lot about the reliability of the C7 torque tube to the point where I am considering not making the jump. Of course, most people only post complaints and not so much when all is good. Are the any happy C7 users out there or are they all doomed to fail?
C7 Reliability
- Thread starter KJS66
- Start date
Chevrolet
CCCUK Member
Where have you been reading that? Can't remember anyone posting on here that they have that problem? If I search on that on YouTube, there ain't too much about it? So was/is it such a widespread problem? On high mileage US cars maybe etc etc?
Put it like this. I know of 5 guys (me and 4 guys in Notts) who own/have owned 6 UK spec C7s, including a Grand Sport (2014-2019 model year cars), The Notts guys also own/have owned several UK spec Camaros supplied by Ian Allan. These are low miles/cherished cars. None of them has had a "torque tube" problem, and we have never discussed that as a C7 potential issue. What has been discussed on here is 8 speed auto transmissions. None of the auto cars above, including mine, has had a problem. with those either.
teamzr1
Supporting vendor
Only an issue with the auto tranny
Some owners of a 2014-2019 Chevy Corvette equipped with an automatic transmission may comment about a rattle noise at the front of the vehicle when the engine is running at slower engine speeds.
This condition may be caused by a deformed propshaft coupler, which may move the driveline support assembly’s front input shaft bearing out of position.
If the bearing/slinger has been validated to be the cause of the noise and/or found to be pushed rearward more than ¼-inch,
continue with Propshaft Replacement procedure in the service manual.
Verify that the propshaft hub clamp bolt is properly torqued.
If the noise is found to be coming from the rear of the engine, raise the vehicle and remove the engine bellhousing rubber inspection plug. Inspect the flex plate.
If an LT1 engine flex plate is currently installed, Chevy says that “it is crucial” that the LT4 flex plate is to be installed.
If an LT4 flexplate is already installed, remove the driveline support assembly (DSA).
Remove the propshaft from the DSA and inspect the rubber coupler for damage. Inspect the crankshaft end play.
If end play exceeds specification, the crankshaft thrust bearing should be inspected.
Inspect to see if the front bearing/slinger is flush with the housing (A).
If the bearing/slinger has been found to be the cause of the noise and has been pushed rearward more than ¼-inch (B), continue with propshaft replacement.
Some owners of a 2014-2019 Chevy Corvette equipped with an automatic transmission may comment about a rattle noise at the front of the vehicle when the engine is running at slower engine speeds.
This condition may be caused by a deformed propshaft coupler, which may move the driveline support assembly’s front input shaft bearing out of position.
If the bearing/slinger has been validated to be the cause of the noise and/or found to be pushed rearward more than ¼-inch,
continue with Propshaft Replacement procedure in the service manual.
Verify that the propshaft hub clamp bolt is properly torqued.
If the noise is found to be coming from the rear of the engine, raise the vehicle and remove the engine bellhousing rubber inspection plug. Inspect the flex plate.
If an LT1 engine flex plate is currently installed, Chevy says that “it is crucial” that the LT4 flex plate is to be installed.
If an LT4 flexplate is already installed, remove the driveline support assembly (DSA).
Remove the propshaft from the DSA and inspect the rubber coupler for damage. Inspect the crankshaft end play.
If end play exceeds specification, the crankshaft thrust bearing should be inspected.
Inspect to see if the front bearing/slinger is flush with the housing (A).
If the bearing/slinger has been found to be the cause of the noise and has been pushed rearward more than ¼-inch (B), continue with propshaft replacement.
teamzr1
Supporting vendor
Whenever the driveshaft support (torque tube) is removed from a 2014-2019 Chevy Corvette for any reason, special care must be taken to make sure the propeller shaft splines are in alignment with the front hub bearing.
The drivetube support tube must be aligned with the engine bell housing before attempting to tighten any attachment bolts.
The propeller input shaft front bearing positioning system is designed to withstand an insertion force not greater than 130 pounds of force.
Using the fastening bolts as an installation method may create force above this amount, causing damage to the crankshaft thrust bearing.
When reinstalling the support tube, the angle may be slightly off horizontally or vertically, which can make alignment difficult.
Do not use the bell housing attachment bolts to draw the torque tube tight against the bell housing.
Any small amount of misalignment may cause the shaft input splines to catch on the crankshaft, driving the crankshaft forward, quickly damaging the crank thrust bearing.
The drivetube support tube must be aligned with the engine bell housing before attempting to tighten any attachment bolts.
The propeller input shaft front bearing positioning system is designed to withstand an insertion force not greater than 130 pounds of force.
Using the fastening bolts as an installation method may create force above this amount, causing damage to the crankshaft thrust bearing.
When reinstalling the support tube, the angle may be slightly off horizontally or vertically, which can make alignment difficult.
Do not use the bell housing attachment bolts to draw the torque tube tight against the bell housing.
Any small amount of misalignment may cause the shaft input splines to catch on the crankshaft, driving the crankshaft forward, quickly damaging the crank thrust bearing.
Vetteheadracer
CCCUK Member
I have owned 3 C7s. Two Z06's and a ZR1 and never had any issues with any of them. I did find out I had a warped wheel on one of the Z06's and GM replaced it FoC. Had one spark plug die enroute to the MOT on the ZR1 a couple of years ago, but changing it fixed the problem. Apart from that trouble free motoring.......I have probably just cursed myself!