2007 Pontiac Grand Prix: harsh or hard shifting

Filed Aug 14, 2012 · Transmission · 92,000 miles · WI

Car transmission slips while taking off from a stop. It clunks and lurches forward unsafely. Vehicle transmission has been flushed and fluids changed. Seems to be getting worse. Does not matter if hot or cold. Does it 3 out of 5 times.

Filed Apr 16, 2012 · Transmission · 96,000 miles · MD

2007 pontiac grand prix gxp transmission failure at 96,000 miles (and 6 months out of warranty). Stopped at traffic light when I pressed the accelerator to go and heard a "clunk" and had no forward gears in automatic. Did have tapshift gears and reverse, though forward gears slipped. Took it to a local dealer (we were out of town) and told the transmission had failed. Had to have the transmission rebuilt at a cost of $3600. Plus car rental and hotel to drive home and return to pick up the car when it was repaired. Second gm transmission failure I've experience in less than two years with the previous one on a chevrolet trailblazer.

Filed Mar 6, 2012 · Transmission · 45,000 miles · PA

I have a 2007 pontiac grand prix gxp w/5.3l v8. Currently has 45,000 miles just recently started having issues with the transmission. From a dead stop trans will slip, than slam into gear, also shutters between 1-2, and sometimes from 3-4. Car does currently have powertrain warranty that I purchased with car. So car will be going in for repair under warranty (I hope) after reading online in a gm owner forum found out about the current investigation with gm transmission failures would really like to see a recall come of this. Because seems that this is a very common issue.. It will leave you stranded without warning, and may break in the middle of traffic causing a dangerous situation to be in. It seems to be too much for a transmission that was designed to be mated to a v6 engine. Not to be mated to a 5.3l v8.

Filed Feb 20, 2012 · Transmission · 60,000 miles · IL

The car has had off and on transmission issues. From a stop, when trying to accelerate. It bogged badly, like it was in 2nd, suddenly it slammed into first and I was on my way. There have been several instances of rough shifts. Also, at times I'll be going very slow 0-10mph and need to accelerate in traffic. The car hesitates for a second before regaining RPM. I have not been stranded yet but wanted to record the incidents. I have been very happy with this car and the 4 gms I drove before ( all 100k+, 2 of them 220k+), but these issues are starting to worry me.

Filed Jan 7, 2012 · Transmission · 77,000 miles · MI

Automatic transmission failure. Transmission shudders, slips and slams into gear. Gxp model.

Filed Dec 26, 2011 · Transmission · 107,900 miles · MO

The issues I have with my 07 pontiac grand prix gxp are the following more often than not now when taking off from a stop transmission revs up and slams into gear causing wheel spin going down highway torque converter will lock up and release at cruising speeds 65-70 MPH causing car to buck erratically causing stability issues.

Filed Jun 4, 2007 · Transmission · 500 miles · FL

Update regarding original odi case number: 10191952. Car has now been in service for ten days. Dealer stated gm "aware of a potential defect" in the transmission, in the final drive gear(s). Dealer replaced two gears and a bearing in the transmission. Pursuant to discussion with dealer representative today, repair did not correct problem. Transmission is now making "clanking" noise at various speeds instead of just at idle. No details received regarding harsh shift, just that dealer felt transmission repair was "unacceptable". Dealer has ordered a replacement transmission from gm. Note: dealer, ferman at cypress creek in lutz, fl has been quite accommodating and rudy schmidt, service director, has made this ordeal much more tolerable. This appears to be a design or manufacturing flaw, which gm did not correct prior to delivery.