Hi anyone know of any issues with the C8 transmission.
Hi anyone know of issue with the C8 transmission.
- Thread starter AdC822
- Start date
Here we go
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- #3
Something I need to know?
There's been a number in the US. Only one I know of in our membership Here's the link to @Ty. post.
Took the C8 in for an oil change and left with a Malibu...[C8 Transmission Failure]
So this happened at 1,400 KM In the dealership parking lot... Booked an oil change on Monday at the dealership. On the ride down (Thursday) and out of nowhere , I noticed the car shifted from 6th gear into 8th (skipping 7) and would also downshift from 8 to 6 (skipping 7) when using the...
canadiancorvetteforums.com
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- #5
Thanks.
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- #6
Looks like a new transmission is going in my New C8. Only 2 weeks old.
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- #7
It really sucks big time.
Y
YFCvii
So would you be willing to share the reason they have behind your new replacement?
So far you answered your own question but without detailing why.
Leads us to have to otherwise speculate. Asking if for the same reason
as the other 1 we know of in
that is posted here on CCF.
Agreed, loss of use will suck however perhaps it can be seen as a yin/yang when getting a new transmission.
Your firsthand specifics would/could be helpful for those with a C8
to watch for and also for those of us waiting to get one of our own (used or new)
because it may likely tip the scale when thinking of waiving the added cost of X-warranty.
Thx
So far you answered your own question but without detailing why.
Leads us to have to otherwise speculate. Asking if for the same reason
as the other 1 we know of in
that is posted here on CCF.Agreed, loss of use will suck however perhaps it can be seen as a yin/yang when getting a new transmission.
Your firsthand specifics would/could be helpful for those with a C8
to watch for and also for those of us waiting to get one of our own (used or new)
because it may likely tip the scale when thinking of waiving the added cost of X-warranty.
Thx
I assume a 2021 since 2 weeks old,
-Mileage xxxx
-Z51 or non
-Did you add the 2 quarts of DCT fluid?
-Have you parked on a steep incline? ( reports of air locks )
-Did they try flushing the system and replacing solenoid
-Dirty shafts are a reported problem from Tremec
-What dealer is doing the work and did they buy the DCT cradle and special tools from GM (required) Many dealers didn't buy all the new C8 tools
-Mileage xxxx
-Z51 or non
-Did you add the 2 quarts of DCT fluid?
-Have you parked on a steep incline? ( reports of air locks )
-Did they try flushing the system and replacing solenoid
-Dirty shafts are a reported problem from Tremec
-What dealer is doing the work and did they buy the DCT cradle and special tools from GM (required) Many dealers didn't buy all the new C8 tools
Last edited:
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- #10
Hi guys engine light came on and had onstar do a check and found a few code (DCT). A GM bulletin is out related to these code and procedures to fix them.
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- #11
Only 800 km on it..
May it be a quick and painless replacement with no repercussions.
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- #13
Yeah let's it's the last time.
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- #15
Yes that was the 1st and about 5 more.
That is an erroneous code fixed by update. Don't know about the others
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- #17
Well let's hope GM did the Update
The update was pushed out in early 2021 so some updates might likely not have made it into all 2021's
I had to get my dealer to install it as it wouldn't install for me. 5 attempts
I had to get my dealer to install it as it wouldn't install for me. 5 attempts
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- #19
Here a breakdown..
On July 24 2021 engine light came on.
with this message.
Idle creep disabled.
P0700
P0844
P0746
GM had a Bulletin #21-NA-033. on these codes.
July 31 engine light back on.Long weekend. Back to Applewood on Aug 3..
P0844.
picked it up on Aug 4. 45 minutes later engine light back on.
P0700
P2853
C2A18
Rear Axle system off..
picking it up tomorrow Aug 25.. New transmission in..
Fingers crossed....
On July 24 2021 engine light came on.
with this message.
Idle creep disabled.
P0700
P0844
P0746
GM had a Bulletin #21-NA-033. on these codes.
July 31 engine light back on.Long weekend. Back to Applewood on Aug 3..
P0844.
picked it up on Aug 4. 45 minutes later engine light back on.
P0700
P2853
C2A18
Rear Axle system off..
picking it up tomorrow Aug 25.. New transmission in..
Fingers crossed....
interesting