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Erratic Shifting of the Automatic Transmission on Pontiac Aztek

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 131,567 (80,000–175,000)
Drive Trains affected: AWD, FWD
5 model years affected: 2001, 2002, 2003, 2004, more2005
23 people reported this problem
Viewing 1 - 7 of 7 comments
Vehicles transmission is shifting hard around 2800-4000 rpm's.
Not fixed yet, just started! Not every time, but 4 outta 10 times it happens. It happens when starting to go into 1st gear from a dead stop, it's a thud or something th n it will take off just fine, don't do it in any other gear or tome
Shifts hard between 2nd and 3rd haven't gotten to fix it yet.
revs to about 2000 rpms before it starts to pull in first gear.. they when going to 2nd it revs to about 5000 rpms then goes in gear
Shifts very hard. Thinking Pontiac Aztec is junk
Dull "thud" or "thump" when shifting through lower gears. No lights came on - just took it to a shop that hooked it up and ran codes - they said my transmission is shot.
Trans shifts at around 3500 to 4000 rpms