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New corvette owner, 14 months i have had my C7 GS. Recently went back to dealer for 3rd torque tube, and the thrust bearing was shot also, in turn the engine and torque tube are junk. I haven’t asked about the transmission issues yet.. praying they don’t void warranty because it was tuned. I have read multiple stories about this but has anyone Else had this much in a short amount of time?
the automatic flywheel has a physical clamp torqued to 96 lb/ft.......
this clamp provides an inflexible connection between the crankshaft and the prop shaft (torque tube)...
when the stub axle is first inserted into the flywheel, it tends to push the crankshaft forward, which causes the thrust bearing wear.
the tsb instructs a test drive, then a re-test of the end play of the crankshaft.... if there is no end play, the clamp must be loosened and the crank shaft pushed reward towards the transmission and re-torqued to 96 lb/ft...
the stub axle (coming from the torque tube) slides in to the plates of the clutch, and is not locked in place.
you will not experience this TSB because the crankshaft and stub axle are allowed to move freely in a "front / back" manner within the clutch plates.
geez sorry for all your troubles, how many miles in and between all these torque tubes? cant image needing multiple ones within this time period unless other issues or faulty parts / installs. very excessive!
Bought it March 1 2022 with 26K miles its at 34K now. 5 weeks first time, 7 weeks second time and now..? who knows.. this dealership does not have the best track record so i am guessing it was faulty install. I have read that if the torque tube isn't installed correctly and shimmed correctly it will do this very thing.
I just bought new hood, Carbon Fiber dash, new stereo components none of which are even installed yet LOL.
yeah , yeah sounds like you have quite a mess now with them if they are now going to say or make excuses as why you tube is toast again AND now engine.
well best of luck and keep up informed.
If you read the article it refers to automatics. It would be a good idea to follow the procedure for M7 as much as possible. I'm guessing a clutch has some "give" that a flex plate does not.
the automatic flywheel has a physical clamp torqued to 96 lb/ft.......
this clamp provides an inflexible connection between the crankshaft and the prop shaft (torque tube)...
when the stub axle is first inserted into the flywheel, it tends to push the crankshaft forward, which causes the thrust bearing wear.
the tsb instructs a test drive, then a re-test of the end play of the crankshaft.... if there is no end play, the clamp must be loosened and the crank shaft pushed reward towards the transmission and re-torqued to 96 lb/ft...
the stub axle (coming from the torque tube) slides in to the plates of the clutch, and is not locked in place.
you will not experience this TSB because the crankshaft and stub axle are allowed to move freely in a "front / back" manner within the clutch plates.
if you say so, but if you read the article, it specifically says "vehicles with an automatic transmission"
but you're more than welcome to worry about it if you really want.....
I'm looking at the TSB PDF, not the 'article' and it has this verbiage for the models it applies to:
2014-2016 Chevrolet Corvette
Built with an 6.2L, LT1, LT4 engine and auto or manual transmission with crank shaft end play concern
and in the 'condition/concern' section:
Corvette Only
Customers may have a Corvette that exhibits one of the following conditions:
1. Customers may have a Corvette that exhibits one of the following conditions:
2. Auto transmission it could be a vibration on takeoff or clunk noise.
The colon at the end of the first bullet indicates the second bullet is related, but they're using bullets with the same cardinal values which should indicate that they 'equal' i.e. two different conditions. More likely it's a poorly written/formatted (and proofread) text - the first bullet is just reiterating the line above it. It shouldn't even be bulleted.
So no, I'm not going to worry about it, but I am annoyed at the ambiguity of the TSB.
Um... How old is the car? Any tune, no matter how slight, in the ECM will invalidate any warranty work on the drivetrain.
Elmer
When looking at the damage caused by the TT I doubt the engine tune comes up in the conversation with GM, especially since two previous repairs had occurred. Even if not covered by the OEM warranty the last repair would have carried a 1-year/12K mile warranty. That is one of the things you get when a dealership repairs your car using GM parts. An engine tune will not cause the TT to wipe out the thrust bearing no matter how much the power level has been changed.
New corvette owner, 14 months i have had my C7 GS. Recently went back to dealer for 3rd torque tube, and the thrust bearing was shot also, in turn the engine and torque tube are junk. I haven’t asked about the transmission issues yet.. praying they don’t void warranty because it was tuned. I have read multiple stories about this but has anyone Else had this much in a short amount of time?
YES! They call us the “Few” who “do”.
however being 24 & driving my Z06 over 30k miles in the first 14 months. I will state once again the C7 is under developed. I went through 3 transmissions
1st went out - Driver & car error
1st - was a bad launch the car hooked shifted good & died on the same street. (Replaced)
2nd - it took Chevrolet 4 MONTHS to rebuild this trans & it destroyed itself within the first 15 minutes
the best part? It broke down AT THE DEALERSHIP while they were shooting a commercial on camera TOP TIER COMEDY
3rd - brand new, current & FINE!
I will state the trans, torque tube & rear diff just don’t seem to go together
the A8 shifts like it thought it knew what you were gonna do but got it wrong
the torque tube is a mechanical failure just like the rotary engine
the diff seems to blow the most on Stingrays (weird)
Some People disagree but I think the owners manual alone proves the C7 is an unfinished product.
i also paid for all 3 out of pocket bc I had an “expansion tank”
Good lord, after reading some of the post in this forum yours included i probably shouldn't bitc# too much... I was very reluctant to purchase 3rd party warranty I waited until the end of the 30 days to do so because of things like that, an expansion tank void, crazy.. well I do hope you got all the gremlins out now.
Torque tube took engine with it..
