Transmission woes
Thread Starter
Intermediate
Joined: Jul 2017
Posts: 41
Likes: 2
From: Scottsdale Arizona
Transmission woes
Got the dreaded call from my service advisor torque tube needed to be replaced on a 6 month old 2017 with 3500 miles on it. At least GM approved the repair without any issues. My vette will be out of commission for 4 days while they replace the tube. Hopefully this fixes the problem
Le Mans Master
Joined: Dec 2015
Posts: 8,711
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From: here
When I read these threads wonder how these poblems get out the factory gates, why do we have cars that seem to run forever without issues and some that end up in the shop..do we not buy the same parts? is the assembly changed? just makes me wonder about quallity control.
Sure new under warranty but why do some get the brunt of repairs? I do get that we mostly hear of problems and not the thousands with no problems, but we buy the same year same models? Surely not just luck of the draw. my 2 cents
To be honest my American cars still run excellent for years with minor issues. Up where I live a new base Corvette manual starts at around 70k and up to 125 k list.
Just google our largest dealer DUECK in BC Canada
Sure new under warranty but why do some get the brunt of repairs? I do get that we mostly hear of problems and not the thousands with no problems, but we buy the same year same models? Surely not just luck of the draw. my 2 cents
To be honest my American cars still run excellent for years with minor issues. Up where I live a new base Corvette manual starts at around 70k and up to 125 k list.
Just google our largest dealer DUECK in BC Canada
Racer
Joined: Jan 2013
Posts: 265
Likes: 16
From: Columbus ga
Just got my 16 Z51 out of the shop....they replaced the torque tube....had 21k miles but it has acted funny for the last 3k or so...small vibration at every gear shift (Auto) If you get on it hard its fine but regular driving and vibration at every shift...kept getting worse. Got car out yesterday...seems to be just fine!! I had them estimate what that repair would cost without warranty...about 3K they said!!!
So i guess in about 15,000 miles or so I need to decide if i want extended warranty or trade to a new one!!!!
So i guess in about 15,000 miles or so I need to decide if i want extended warranty or trade to a new one!!!!
Thread Starter
Intermediate
Joined: Jul 2017
Posts: 41
Likes: 2
From: Scottsdale Arizona
Transmission woe update
Got the dreaded call from my service advisor torque tube needed to be replaced on a 6 month old 2017 with 3500 miles on it. At least GM approved the repair without any issues. My vette will be out of commission for 4 days while they replace the tube. Hopefully this fixes the problem
Basically he said that when corvettes are shipped from the factory the suspension and tranny and differential are wrapped up tightntobthe body by straps. When the corvette is delivered to the dealer and the straps are taken off it creates a loose gap in the differential and it not retorqued during the PID process could cause a misalignment that over time could lead to the issues being experienced with the transmission. Kind of made sense to me. What do you think
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Le Mans Master
Joined: Dec 2015
Posts: 8,711
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From: here
So the service tech that gave me the bad news about my transmission failure told me how it probably happened. You all be the judge.
Basically he said that when corvettes are shipped from the factory the suspension and tranny and differential are wrapped up tightntobthe body by straps. When the corvette is delivered to the dealer and the straps are taken off it creates a loose gap in the differential and it not retorqued during the PID process could cause a misalignment that over time could lead to the issues being experienced with the transmission. Kind of made sense to me. What do you think
Basically he said that when corvettes are shipped from the factory the suspension and tranny and differential are wrapped up tightntobthe body by straps. When the corvette is delivered to the dealer and the straps are taken off it creates a loose gap in the differential and it not retorqued during the PID process could cause a misalignment that over time could lead to the issues being experienced with the transmission. Kind of made sense to me. What do you think
Not sure I buy it, but I'm no mechanic....seems a weak link in the delivery. Next they will say vibration effected the computers on cars.
Kind of reminds me of a post that mentioned speed bumps
Burning Brakes
Joined: Jun 2014
Posts: 981
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That's the first I've heard of re-torquing bolts during the PDI. I'm very skeptical of that explanation... almost to the point of calling it pure BS.
The shipping straps that hold the car to the carrier don't put any load on the joint between the torque tube, engine, and transaxle assembly. All of those parts are separated from the body by isolation mounts.
The shipping straps that hold the car to the carrier don't put any load on the joint between the torque tube, engine, and transaxle assembly. All of those parts are separated from the body by isolation mounts.
Last edited by WelderGuy; Jan 13, 2018 at 07:59 AM.
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Good luck - hope the repair puts that issue to rest for many miles.
Burning Brakes
Joined: Jun 2014
Posts: 981
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The 2016 PDI doesn't mention re-torquing any bolts.
http://www.stingrayforums.com/forum/...pdi-forms.html
http://www.stingrayforums.com/forum/...pdi-forms.html
Safety Car
Joined: Aug 2012
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The torque tube is not part of the transmission so "torque tube" woes would be a better title. It is roughly analogous to a drive shaft in a typical vehicle where the engine and transmission are bolted together but in this case the "drive shaft" is rotating at engine RPM transferring power to the divorced transmission.
Although there are far more of the other variants of C7 sold compared to the Z06 the steel torque tube (used because of the goofy V4 mode as another part of the vibration damping) seems to be far more prone to various issues.
Too bad another company didn't patent and refuse to license the rights to displacement on demand/AFM/whatever "happy" name GM calls the next iteration because without it there would have been a lot less problems with the C7 generation and a driving experience more befitting a sports car.
Although there are far more of the other variants of C7 sold compared to the Z06 the steel torque tube (used because of the goofy V4 mode as another part of the vibration damping) seems to be far more prone to various issues.
Too bad another company didn't patent and refuse to license the rights to displacement on demand/AFM/whatever "happy" name GM calls the next iteration because without it there would have been a lot less problems with the C7 generation and a driving experience more befitting a sports car.
Last edited by NSC5; Jan 13, 2018 at 10:31 AM.
Le Mans Master
Joined: Sep 2003
Posts: 8,847
Likes: 795
From: Longview Texas
What I don't understand is why GM cannot build a torque converter without problems. They have been making transmissions and torque converters for decades. How is this one different from the thousands of others?
Last edited by TEXHAWK0; Jan 13, 2018 at 02:20 PM.
Burning Brakes
Joined: Feb 2006
Posts: 983
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From: Stafford Virginia
The A6 seemed to be just about bulletproof in the cars equipped with them. GM would be better served it seems to go back to that package.
Did the A8 really improve in any of the target parameters GM wanted to achieve? Durability? Fuel mileage? Smooth shifting? Performance metrics? Just curious. I have only bought manual transmissions in my Corvettes so I really don't know anything about the automatics except what I read here.
Did the A8 really improve in any of the target parameters GM wanted to achieve? Durability? Fuel mileage? Smooth shifting? Performance metrics? Just curious. I have only bought manual transmissions in my Corvettes so I really don't know anything about the automatics except what I read here.