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: 137,752 (80,000–236,700)
Drive Trains affected: AWD, FWD
5 model years affected: 2001, 2002, 2003, 2004, more2005
34 people reported this problem
Viewing 1 - 9 of 9 comments
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
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
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.