I bought my GMC 2008 Acadia Feb 6, 2014 with only 42000 miles. After 3 months of having it. I have had to change the tires, front end alignment and now replace the transmission. I couldn't buy the extended warranty because I could not afford it.

There are so many complaints about people having to replace their transmissions in their Acadia's. Why has GMC not had a recall for the transmissions on these vehicles. Thanks to replacing the transmission we had to cancel our vacation that was planned in June. THANKS A LOT GMC. Tell that to my children. I will never ever buy GMC vehicles again. If I can sell this piece of sh*t I will.

Manufacturer warranty expired January 1, 2013. Transmission went out February 7, 2013. First noticed that the vehicle would not go into reverse. Then slipping between 3-4 gear. pulled into transmission shop, they said this is very common, they are seeing 2-3 of these vehicles every week. The GMC Acadia has the 6T75E transmission in it as does the Saturn Outlook, Chevy Traverse, Buick Enclave. They have an inferior transmission installed that has a Wavy Plate that breaks inside the transmission. This causes extensive damage to the gears. The entire transmission has to be rebuilt. GMC is aware of this problem but refuses to recall. The 6T75E or the 6T70E transmission is the same as well as the smaller version of the 6T40E transmission. I had purchased an extended warranty that paid all but my deductible thankfully. February 13th, 2013 - sensors within the transmission failed and had to be replaced. March 2013 - another sensor went out inside the trainsmission, had to R&R. February 2014 - Transmission slipping again, locked in 2nd gear. Took to same repair shop, have to pull the transmission again to replace yet another sensor. Have been in negotiations with GM. 1st 2 hours senseless conversation. Finally forwarded to a supervisor. Created a complaint number. Waiting for them to call back over 1 week.

No warning no nothing. Driving in 30 mph zone and when to 40mph zone and when I accelerated it wouldn't go. Called my husband and he told me to see if I could manually shift and it went in low but wouldn't do anything else. Drove in 2nd to have diagnostics run.codes p0770 p0776 and a couple others I can't remember. I

Taking to Greiner GMC tomorrow to hear the bad news. We bought it in October 2007 so warranty is out of date. Read so many issues just like this makes me wonder why no recall. My husband works and drives a ton of miles and replaces his GMC pickup every 18 months so has been faithful GMC buyer. I am not so confident.

i've been dealing with GM customer service for about a week now with the same failed wave plate issue. My car stopped dead with my kids inside about 7 miles from home. I'm livid that this has happened and even more so after reading these postings. My 2008 Acadia has 48,000 miles on it, has been drive LESS than 10k miles a year and is just 6 month out of the 5yr/100k powertrain warranty. After opening a case with GM and much negotiations they did the repair for $500 - that might be ok for some people but it infuriates me! Not only am I out $500, I'm also out for the cost of towing the vehicle to the dealership and another $400 for a rental vehicle that they refuse to reimburse me for. I was given a Volvo xc60 as a rental because all they had was a pick up truck and a BMW when I went to Enterprise. The Volvo was the cheapest. 5 days later I was told they would have covered the rental had I chosen a GM vehicle. NO ONE TOLD ME THIS UNTIL I HAD ALREADY HAD THE RENTAL FOR 5 DAYS! Why did I have the car for 5 days? Because it took Michelle at customer service and her "field unnamed GM counterpart" that long to come to a decision on the case. I wasted my money on a rental car because they couldn't get back to me with a decision on what my "good will" warranty would cover.

It's absurd to me that this issue is so prevalent and a recall has not been sent out. This is a known issue at GM and a bulletin has gone out to all service departments detailing the problem and the repair. Why has there not been a recall? Has anyone heard of a class action law suit regarding this? Anyone want to start one? This was my first experience with a GM vehicle and will be my last. I feel just awful as 4 of my close friends bought the same vehicle after I raved about how much I likes mine. This, to me, was the perfect mini-van alternative for my family. Now I'm kicking myself for not going with the mini-van.

Completed new suspension / front end, went to pick up vehicle from tire store. They informed me that the GMC Acadia transmission will not go into reverse. Called transmission shop, found out that this is a common problem with the GMC Acadia. Had to put into neutral, push it backwards out of the shop, drive it to the transmission shop.

1 day later, the transmission shop informed me that the tranny blew up inside. Parts fell out of the housing when they opened it up.

Had to take it apart, wait for extended warranty company to send rep. to inspect tranny, give permission to rebuild.

During inspection found another problem, will detail that elsewhere.

Got vehicle back after 10 days.

Disappointed. That's all it really comes down too. First off I had the water pump fail, Nice right at about 30k miles. Anti-freeze pouring out. Under warranty yeah!!! Next, about to go on vacation the next day driving to Minneapolis from chicago, Transmission just explodes, Took them 3 hours to clean up the debris. Shop Tech says they put a horribly small trans for the heaviest SUV in its class. Pretty smart those engineers at GMC. So be warned about this Trans. Make sure you buy an extended power train warranty. It will save you in the end when this car's trans goes and it will go.