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hrbeta said:
..I am really tired of explaining the issue and most shops assume their customers are mechanically/technically challenged  :banghead:
Thanks so much.
Yes, this is very frustrating. I've rebuilt engines, and done everything else (turbo builds, swaps of almost anything, brake jobs etc.). But yet when I talk to dealerships they treat you like your still in high school. When it comes to transmissions I leave it to the experts in that field.
 

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@hrbeta, the case has been opened again. The case number will remain the same. Please, send me a private message if you need this information.

I recommend telling your specialist the dealership you would like to go to and have them set the appointment for you. They’ll be able to let the dealership know what’s going on and they’ll also know when you’re taking the vehicle in which they can set up a time and date to talk with the dealership as to what they find with your Acadia.

You’re very welcome.

Michelle, GMC Customer Service
 

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Just read this thread and man, @hrbeta, you have our sympathies. A new vehicle should never have this problem and in fact, I think GMC should give you a new car of your choice. I have a friend who bought a brand new jetta and his car always had a problem that after 8 months of driving, VW replace his jetta with a brand new one. But until this day he swears that he still just wished that his original car did not have those problems. Sorry I digressed. Your problems is very much similar to mine, I have a 2008 SLE AWD (bought brand new). I first experienced the problem a week ago, it would hesitate when backing, sometimes would not drive forward at all, etc... I had it towed to my dealership and today I went there and saw that they had already pulled out the transmission and disassembled. The technician said they think its a transmission problem. Some here said its sounds like a wave plate problem. The technician said he will call me later today and give an update. My acadia has 67,000 km (about 42k miles). I will give an update here and in the thread I created if I hear from the technician.
 

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Discussion Starter · #64 ·
Thank you @preytor, it's been inconvenient to purchase a new car to find ourselves dealing with these issues. What puzzles me the most is that to this day, I do not believe the GMC shop knows what it is really wrong with my Acadia. They started by blaming the computer, then the tranny and last time it was the engine (not to mention the early hints that it was all in my head).
I hope your issue also gets solved in a satisfying manner to you, after all, we are good faith paying-customers looking for a sensible solution to a problem we did not cause. :sosad:
Let's keep each other in the loop.
 

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Thanks @hrbeta. The service advisor just called me and said that the problem was "wave spring" (maybe he meant "wave plate"), the good news is that it has been fixed and will be ready for pick up tomorrow. I hope you will find the right dealership with competent and able technicians and fix your problems. If not, I really think GMC should do something about your situation, maybe yours would qualify for lemon law.
 

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@DVelasco68, I do have the towing package.

I got two quotes for rebuilt transmissions today from independant shops: one at $3,000 and the other at $2,800 including towing to their shop.

I kid you not though, the GMC dealer's service advisor told me "expect it to start at $6,000, plus whatever parts we have to replace". Maybe they do that so when you go to pay they can say "GM has offered to reduce your bill by 50%", which puts it in line with the other shops, who knows.
 

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Not what I wanted to hear...

Hopefully the 2013 changes to the transmission will cut down on issues...

Extended Warranty -> Here we come.... :beer:

Gills said:
@DVelasco68, I do have the towing package.
 

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Posting an update here, my 2008 acadia had been fixed, dealership rebuilt the tranny. So far it its shifting properly and the ride is smoother even before the tranny issues.
 

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Picked my Acadia up from my buddy after the tranny rebuild; here's what was left of my 3-5-R wave plate.



NB - it's supposed to be a full circle... Apparently the drum was very badly scored by the wave plate, and the 2-something-something wave plate was damaged as well.

Drove it 120 km back home; shifts seem precise although the 3-4 shift is slightly harsh. He said it'd take some time for the transmission to "re-learn" how to make the 3-4 shift with a properly-functioning transmission...

I had him put new rubber on it as well, new set of Michelin Lattitude Tours, same as before.

Crossing my fingers that I've seen the last significant repair for a while!
 

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Hello hrbeta, I just wanted to check in with you and see if you have made any progress with this issue. I purchased a 2012 Denali AWD last September and I've been noticing something odd happening with the transmission. It's not as bad as your issue sounds...yet. Mine will rev up to 4k rpm when accelerating from a stop but the car doesn't feel like it is going as fast as it should. Kind of as if something is holding it back. Also, shifts feel like a manual transmission in a truck where it takes a bit longer for each gear to engage. You get that sort of glide feeling when you press the clutch in on a manual when shifting gears. It doesn't happen all the time but enough to concern me and to start searching for folks with similar issues on this forum. My car has less than 7K miles on it.
 

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I wonder if the 13 transmission has been redesigned to take into account all these wave plate failures. I realize it has a new RPO code, but what about the internals?
 

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@forevr5688, I’m sorry to read about the concerns you’re having with your Acadia. Under normal circumstances this would be covered under the Powertrain limited warranty. I understand time is very precious, but you’ll want to take the vehicle into the dealership to have them look at this. I also recommend taking the technician and/or service manager for a ride so you can show them your concerns.

Michelle, GMC Customer Service
 

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As someone has pointed out, the '13 transmission weight is different, we know that the 2013 FWD / AWD transmissions have new designations:
• 2013 FWD - (M7V) Transmission, 6-speed automatic, electronically controlled with overdrive
• 2013 AWD - (M7X) Transmission, 6-speed automatic, electronically controlled with overdrive

As for waveplate issues, there haven't really been any 2010+ with waveplate issues (I believe), it was redesigned and hardened a few years ago (late 2009???)....

AA/78U-Supreme Forum Moderator said:
I wonder if the 13 transmission has been redesigned to take into account all these wave plate failures. I realize it has a new RPO code, but what about the internals?
 

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While I agree; we are responding in a thread that has shown a blown 3-5-R from a 12 model
 

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The original Posters (hrbeta) problem was never diagnosed as a waveplate, only Gills was, and I don't think his was a 2012.... I was just trying to clarify that...

Edit: his was a 2007...
 

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:notworthy:
 

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:cheers:
 

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I am having the same problems with my 2012 Arcadia, with accelating and my engine reving up. Did anyone here find out why this happens ? My son also drives my vehicle once in a great while and told me my transmision is going out. Ha Ha ! I only have 58 thousand miles on it. Help !
 

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That exactly describes what happens to my 2012 sometimes. It never happened in the 2008 or the 2010. I have no idea wha tis causing it, but the Acadia does not respond and then 'suddenly' it lurches forward and acts normal again.
Was this ever resolved with your 2012 Acadia?
This is exactly what our 2012 Acadia does. There is a hesitation even though pressing the accelerator, car hesitates and then suddenly lurches. This has happened from reverse to drive and also on the highway when needing to adjust speed. To this year 2019, no codes determined to label the issue. Have had a number of near misses getting rear ended because my car won't continue to accelerate while merging on highway. Found out this week the 7 year old Acadia transmission has failed. (137,000 miles)
 
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