car shutters in second and third and reverse

 

Did you bring it in right away or did you try characterizing the problem(s)? I'm wondering if say you put it in manual mode and drove around for awhile going from 1st-2nd-3rd-4th-5th-6th-7th-8th then back down to 7th-6th-5th-4th-3rd-2nd-1st .... then back up many times... Exercising all of the valve/gates... If it's a contamination problem I'm wondering if you might have been able to clear some of it up by exercising everything while making note of the level of shutter(s) in 2nd-3rd-reverse.. If it has any affect, etc. Would be interesting to know if it stays the same, gets worse, or possibly gets better. etc.

 

I brought it to the dealer to see if they could fix it. They tried two reprograms from GM. They didn’t work and now they choose to do the valve body instead of the transmission. It was a bulletin from GM to go inside the tranny.

 

Check the label on the driver's door - will show the month and year when built.

 

Yes usually it is the call of the warrantying company. I think I would go the less intrusive route first. When you tear major assemblies apart you risk some other subsystem being compromised by human hands. Less is more many times.

 

GM is doing a new transmission with in a few weeks. They gave up on doing just the valve body because I assume they are not having much success.
$25000 it’s cost them wow

 

Yep, my guess it's NOT GM's cost with a DCT that new. It's Tremec's. My experience with GM supply agreements is the "supplier" is responsible for part failure thru warranty or a time negotiated. That can include the dealer cost GM pays them to replace!

 

I bought an off lease '99 Porsche 996 out of warranty in about '03. After I'd owned it about 2 years it developed an intermix related issue where coolant was in the oil.This turned out to be a head porosity issue and was classified as a catastrophic motor failure. With a little work on my part, help from the local dealership, where I did not buy this car BTW, Porsche agreed to "Goodwill" me a new motor if I would pay for the R&R, oil and coolant which would cost about $1000. This car was not under any type of warranty and the new motor had all the newest and latest updates.
I also bought a '13 Subaru Crosstrek, new, first year. 5 years in, no warranty, Subaru NA contacted me wanting to replace all my valve springs which was done and I was given a brand new Outback to drive for a week. Subsequently I got a couple of letters from them stating the steering assembly and also the CVT trans would be warranted to 100K miles. Being on the Subaru forums for over 10 years, I have heard of 2 transmission related failures.

I think GM needs to rethink how customers are treated and give them self assurance that any issues or problems will be taken care of promptly. Lexus does the same, but nothing has gone wrong since '05 on our RX400h hybrid.

GM's cavalier attitude toward customer issues is why I do not own a C8 currently. They didn't take care of me in '72, '78, '79, or '85 when I bought new cars from them. Apparently nothing has changed.

 

Happy for you, glad they stepped up and are going to help you. I don't think it's costing them that much, maybe you if you were to buy it outright. My only bitch now would be why a few weeks? Why not next week?

 

I had to get in line behind what they already have. They only have one C8 tech

 

new tranny is in and it shifts like butter. Never knew what it was like to be so smooth. Tranny was delivered in 7 days and installed in two. Nice to be done