I have a 2001 Pontiac Grand Prix GT.
While driving I have notice after about 20 miles my RPMs will go up about from 2200 to
about 2800 for a couple miles and than shift back down for a couple miles. And than it will
repeat this about every 3 miles. I am really not sure what is causing this. It will do it while
the cruise is on and off. Can anyone help....
Check the transmission fluid,may be low,causing the surge,if not and there is and engine light on in the car,go have it scanned,bad sensor.
If you've got some miles on this car you're most likely losing the torque converter clutch lock in. It's common on these transmissions. My '00 Grand Prix GT with 154,000 miles on it has lost both torque converter clutch lock in and 4th gear. If you're lucky it's just the torque converter clutch solenoid failing. Still not a cheap fix though. HTH. -Jim
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