GenVibe - Community for Pontiac Vibe Enthusiasts

I've got an 05' automatic, 55k mi, with a fresh PCM via a recall, installed a couple months back.My problem seems to be on the downshifting when I decelerate. It seems to bog at times before it finally shifts. I was passing through a bumpy intersection so I slowed without braking, and it seemed like it wanted to stall, rather than downshift.CEL is not on. Today I did a drain on the fluid, no change.Could it be the PCM they installed is bad?

just to let anyone know that may have read this, it was a bad PCM/ECU. They installed a new one a few months ago to satisfy the recall, and it must have been defective, which caused the harsh downshifts. another replacement PCM (no charge thank god),and problem solved!

Glad you figured it out. Sorry we weren't much help on this one.