Erratic Shifting of the Automatic Transmission on Pontiac Grand Prix

The transmission pressure control solenoid may fail causing erratic shifting. Our technicians tell us that partial dis-assembly of the transmission is necessary to replace a failed pressure control solenoid.

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Average mileage: 140,855 (12,000–238,000)
14 model years affected: 1990, 1995, 1997, 1998, more1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
119 people reported this problem
74 people shared problem details
2005 Grand Prix started jerking before the gear would engage and now you put it in a gear and push on gas peddle and it won't go anywhere in any gear. If you are on a hill it will drift backwards. If you shut it off and wait a while and restart the car and put in gear it will engage but doesn't have much power. Could that be the transmission going bad!!
I was just at Walmart and try to start my car. It reversed just fine. But when I put it in drive it would not go. I put it in first gear and it went it was able to shift to second manually, and then it shifted the 3rd. I drove it home it will not going to drive. What do you think it is? Did I lose my transmission?
Transmission whines and shifts hard after a while of driving
Car shifts hard from 1st, 2nd gear, stops once 40+ mph are reached. Can let the car sit for 2 to 4 hours and it will not shift hard again.
Once the transmission gets warm, it revs engine and shifts hard through 1st, 2nd and 3rd gears. Once a speed of 45mph+ is reached the car is fine. Solution, replacing solenoid and having the valve checked out at as well.
Transmission began slipping then stopped pulling in any gear. Diagnosed as the Transmission Pressure Control Solenoid. Replaced the defective part.
I'll be driving and it feels like a slip of the tranny, this is very spuratic.
Erratic shifting. New pressure control solenoid fix the problem. Recall it.
Code 1811 causes hard shifting; only when hot
When I tried reversing into my drive way (which is slightly tilted upwards) and my car would refuse to move. Then while I was driving it would jerk when i was at 45mph. I then would increase my speed at 50-55mph it would stop.... I have had problems with this car before and it has never been like this, Looking for assistance so i can find out what the next step is that I would have to take.
500 dollar fix, another common issue with this car.
hard upshifting between 1st & 2nd & 3dr.trbl.code 742 torque conv.clutch circuit stuck on yesterday for 10 miles.mile.Car was bucking like a horse on shifting & felt like slippage.could be 1-2 shift or 2-3 shift solenoid.
erratic shifting, shift smooth at cold start up, once it warms up the shifting becomes erratic
2000 GP Pontiac, Transmissions shop says not worth fixing yet. Would be to costly.Some times hard shift some times smooth. I will wait for transmission to go bad & then have them rebuild it. Cars been hard shifting since 80,000 miles.
Had transmission rebuilt 3 years ago. Just had power steering pump replaced , camshaft Sensor . My car has been leaking big puddles. I'm to believe bottom seal to transmission. Now problem I go to warm car up and take off .the car has hard time going .finally start to move and seems to run ok. What is going on ???? Katastrafi
a pause then jumps into gear
Intermittent hard shifting in all gears. Feels like it has a shift kit. Have had the issue for 5 years now. Only have the problem in winter months (Dec, Jan, Feb) and only shifts hard after it warms up. Shifts perfect in warmer months for the past 5 years. I was told I need a trans solenoid and was quoted $1100 by a local shop. Decided to just drive it until it breaks.
Error code P1811
When shifting into gear 45 mph it slips and slams hard into the next gear. Looking at the high-pressure solenoid to be replaced
Not fixed yet.
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