I have a 2006 Pontiac gxp and I am writing in to complain about a transmission failure. I have been reading all over the internet and there are a ton of failures. The car only has 83K and was never modified or changed. It is going to cost over 3300 to fix this issue.

- Colonia, NJ, USA

2006 Pontiac gxp, December 2013 transmission starting slipping on interstate near charlotte North Carolina. Car transmission then completely stopped working, no forward or reverse. Car has 86,000 miles on odometer. Vehicles towed to Virginia. Had vehicle transmission checked by GM and private auto shop, no codes found, both said trans got hot and burned up. No local trans shops will rebuild the transmission due to repeat failures.

- Marion, VA, USA

While driving to work in my Pontiac Grand Prix gxp one morning I came to a stoplight. Car was running normal. I went to leave the light and the car did not move. The engine would just rev up. I was almost rear ended because when the light turned green I let off the brake and pressed the gas and I did not move. I thought I may have knocked the transmission into neutral but I looked down and the car was in drive. This is when I realized I was the next victim of the GM LS4 4T65E-hd combo kit. I was stuck at the light in the middle most lane. I put my hazards on.cars had to go around me, and I could have gotten hit. Being dead in the water sort of speak, I waited for the road to clear and I checked if I had reverse. I did luckily, and I was able to back my car into the parking lot a half a block back. This was a dangerous situation for any driver. I have always been a GM fan but this car is changing my mind. It would not be so bad if GM would take responsibility, and fix their defective transmission problem.

- Lochbuie, CO, USA

I have a 2006 Grand Prix gxp with 118K miles on it and the transmission has failed and need rebuilding the dealer ship told me to make a report because this is a ongoing defect.

- Houston, TX, USA

The transmission is constantly slipping in and out of overdrive. It is still doing this after a 2nd transmission flush. The first was done before 50K miles. Then second was done recently. This is still an issues. Both times there were no metal shavings found during the change.

- Dunlap , IL, USA

2006 Grand Prix gxp transmission.

- 77375, TX, USA

Transmission started slipping over 70mph. Rpms began to fluctuate sporadically. Based on other posts looks like the tranny is going out. Bought it from [xxx] 2yrs ago and was told tranny had been replaced so I felt confident buying the car with 90K B/C Pontiac have historically been great cars. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Lewisville, TX, USA

The transmission slips and bangs bad after driving around 65 mph then slowing down and turning on an off ramp trans fluid temp is about 195 degrees at time of incident. This slip happens in low gears sometimes as well after driving around on short trips. Also, replaced gear shift sprague lock something two times already. Also the ac heater fan motor has burned out, now new one works intermittently.

- Burr Ridge, IL, USA

Transmission failure. Torque converter clutch failure causing the transmission to fail.

- Monroe, WI, USA

Looked at transmission temperature gauge to see the trans temp was 208 degrees. The car was recalled for a trans line replacement which was done. This did not fix the problem. Now when car is cold I feel slippage when giving the car gas going up an incline. If you go to edmounds.com you will be able to see this is a common problem. Many people are having this problem. The trans line that was replaced has a few fins build into the line. This does not help the transmission stay any cooler. 208 degrees is way to hot for a transmission to be run and hold up. It burns up this torque converter up then takes the transmission out. Please help as this is costly to have a torque converter and transmission rebuilt. I was told a trans cooler would fix the problem. Thank you

- Millersville, MD, USA

I have a 2006 Pontiac grandprix gxp that I purchased new and as of 5-28-13 I have driven only 54000 miles when on 5-28-13 after coming to a complete stop at a traffic light I turned right and the car only began to crawl into oncoming traffic. Thankfully I didn't cause an accident as the left lane was open to swerve around me, but needless to say the cars where beeping and swerving to avoid me as I could only go 5mph. Later that day I drove the car slowly to the dealership just for them to tell me the transmission has failed. I would think it should last alot if not double the 54000 miles I currently have on the vehicle and it would cost me 3500 to replace!! after being frustrated and thinking what if the left lane was not open, where would I be then, doing some research there are tons if not all of the gxp version of the Pontiac grandprix with the same exact issue, how come there's not an recall, this can definitely cause an accident as you cannot accelerate with no pre warning signs, as I experienced a near miss.

- Matteson, IL, USA

The contact owned a 2006 Pontiac Grand Prix. The contact stated that whenever he drove the vehicle, the transmission slipped. The vehicle was taken to the dealer for inspection and they stated that the torque converter needed to be replaced. The vehicle was repaired but the failure recurred. The manufacturer was notified but provided no assistance. The failure mileage was 70,000.

- Bethlaham, PA, USA

As I'm driving on the highway and I reach a speed of 70 mph or higher, the RPM's start to jump around and can feel the car kicking in and out of over drive. At first it started doing it going up a hill or incline on the highway but as time has gone on the problem has gotten worse and now does it even on straight, flat roads. I got on edmonds website and posted the problem on there asking if anybody knows what's wrong with it and how to fix it. I got people replying back to me saying that it is my transmission and they have had the same problem and GMC will not help them pay for or repair it. There are probably a 100 people that I know of alone that are having the same problem. I think this should be looked into, it could become a safety issue and not only that, GMC should be held responsible for making and selling defective equipment to the public and refusing to fix the problem. Something needs to be done, but no matter what happens I will never buy another GMC vehicle!!!!!

- Pekin, IL, USA

I bought this automobile brand new ($32,000) from haley Pontiac in June of 2006. While driving with my grandchildren in the car the transmission failed completely in traffic. The car only has 86,859 mile on it. I contacted both GM and GMC and they deny any wrong doing or even partial reimbursement. After doing research on the internet I have found over 2000 people who had the same issue. GMC knew when they made this vehicle that the transmission was not compatible with the cars V8 5.3 litre engine but sold it anyway. Also since they knew the issues that would arise this make and model came without the 100K powertrain warranty (which they had before and resumed in 2007). I'm really curious with all the complaints why hasn't this car been recalled and repaired prior to consumers having to pay over $3000 for new transmissions (to GMC service departments). What will it take for someone to hold them accountable and treat consumers fairly" does it actually take a death from the faulty mechanical issue? or perhaps a class action lawsuit" I'm not certain but I truly believe that my complaint as well as all the others out there (I'm certain some have already been sent to you) should be grounds enough for an investigation as well as a recall. I plan on pursing this matter by writing to both the state attorney offices as well as the president of GM. Thank you for taking the time to read my complaint.

- Richmond, VA, USA

4T65E-hd automatic transmission failure. Car does not engage any gear to include reverse. According to General Motors, this transmission is rated to handle 280 pound feet of torque. However, it was mounted in a vehicle (2006 Grand Prix gxp) which by General Motors' own admission makes 323 pound feet of torque. Therefore, by General Motors' own admission, the transmission they selected for this vehicle was never designed to handle the motor to which of was mated. Max torque for this vehicle occurs at just 3800 RPM. It would seem then that an individual would not need to be engaging in hard or abusive driving to exceed the design specification of this transmission.

- Fort Wayne , IN, USA

We have a 2006 Pontiac Grand Prix gxp and the transmission started slipping and shuddering. My wife was driving the car to a shop and it just quit and would not go forward or reverse. We had to have the transmission replaced. $3,000 gone. I contacted Pontiac customer care and they did not help us in any way. I have read story upon story about transmission failures on this particular vehicle. People have been left stranded and without a vehicle while repairs were done to correct GM's problem that they will not fix! is there anything anyone can do to at least help reimburse those who have been burnt by GM's lemons? any help would be greatly appreciated.

- Mckenzie, TN, USA

Got my gxp in 2-12-10 with 41000 miles on it. Transmission went out in 56000 miles. Cost 2500 to fix now with 89000 miles the transmission is slipping again. I loved GM cars and if they don't recall this soon. I will be going to Dodge hemi power.

- Atlanta, GA, USA

Currently on my third transmission. Second transmission was rebuilt, then replaced. Car currently has 91K on it.

- Pinckney, MI, USA

2006 Pontiac Grand Prix gxp. Total transmission failure at 110K. This is a family vehicle which was purchased new. All service maintained, never even close to being abused and this transmission should be well within its life. As I have read, these transmissions are basically(supposedly) a beefed up version of the transmission used in the 3.8L models. It is same as used in the Impala ss, where many many failures have occurred. Completely failed at 110K. Took into dealership on a Monday, they ran diagnostics, test drive it twice could not find any issue. Vehicle towed in 24 hours later, with a complete trans. Failure. It started all of a sudden, would not shift properly, hard shifts, then would skip gears, then would not go into reverse, then would not engage at all. This is a very serious issue that deserves a recall. Only real option is to replace with a factory rebuilt transmission. Obviously GM will not do a voluntary recall, they are making too much on the sale of rebuilt transmissions.

- Elkhorn, NE, USA

Transmission failed on March of 2012 bad torque converter the whole transmission had to be rebuilt and just failed again on Sept 22/2012 last repair in March cost was $2800 this transmission has less then 6000 miles since being rebuilt and failed again Pontiac 2006 Grand Prix gxp 5.3 engine.

- North Adams , MA, USA