2007 GMC Acadia: harsh or hard shifting

Filed Apr 6, 2015 · Transmission · 98,000 miles · MD

Major shuttering in transmission harsh shifting making hard to accelerate.

Filed Dec 5, 2013 · Fuel system, Transmission · 91,271 miles · ME

Pushing the gas pedal the vehicle revved up and the gears slammed into gear, engine light came on and seems to have no first gear as of now. Seems it may be the wave plate within the transmission.

Filed Jul 13, 2013 · Engine, Transmission · 83,680 miles · OH

Vehicle is hard shifting from 1st to 2nd gear. Had serviced with new transmission fluid on 7/2/13. On 7/5/13 vehicle would no longer shift at all while traveling on the freeway on our way to family vacation to hilton head sc. It was towed to parks chevrolet in charlotte, nc where transmission was disassembled with parts replaced and rebuilt. Upon departure of pickup vehicle is still shifting hard from 1st to 2nd gear (around 20-25mph) and we hope to make back home to ohio safely. I've researched this issue is common in gmc acadias. Issues needs addressed and resolved for safety! I will be returning the vehicle to chevy dealer when we return home for further service. We have already paid the warranty deductible and hope to not incur more expenses!

Filed Jun 18, 2013 · Transmission · 80,000 miles · OH

This issue started when I was driving down the road at 35mpg. The acadia tried to shift into a higher gear but clunked very loudly and jolted the whole car. From that point forward the vehicle was stick in 3rd gear. It wouldn't up shift or down shift. The car limped home but starting on hills or at stop signs was almost impossible. Once I got the car home I checked the transmission fluid. Transmission fluid ok. I then tested the car again by trying to back out of the driveway. The transmission made a loud grinding noise and would now longer move in reverse. I had the car towed from my house to a local trusted mechanic. The mechanic stated that the waveplate failed. He also said that this was a know deficiency in these vehicles and that the transmission would need to be replaced or rebuilt. I had to spend $3950 to rebuild the transmission on a 2007 vehicle with 80000 miles. I would appreciate a reimbursement from gm for this obvious quality problem.

Filed Sep 8, 2010 · Transmission · 115,000 miles · TN

Driving my 2007 gmc acadia. Went to pass a slower vehicle, pressed on the accelerator to pass and the transmission went haywire and the accelerator stuck. I had to put the car in neutral to get it stopped. The rpms were in the 4000s. Then the acceleration would stop and start again over to 4000. Luckily when I passed the vehicle there were no cars in front of me or I would have had a major accident with the acceleration out of control. I took it to the dealer and they told me that two of the timing chains were very worn and there was an issue with the clutch pressure control with harsh shifts in drive range 3rd and/or 5th gear. This is the second time I have had problems with this issue. The first time the gmc dealer 'flashed' (reprogrammed) the transmission, even though it was not acting up when the car was taken into the shop. If this issue is not addressed "properly", I believe someone somewhere will be injured or killed. The condition my vehicle exhibited leaves me with a very uneasy feeling.