Throttle Issue

My 00' GT has 55k on the dial.

Sorry I don't have more detailed info but I notice on rare occasions when suddenly releasing accelearator, usually when accelerating that I will feel the car react versus just seeing the RPM needle drop when releasing the accelerator.

I am curious if that is normal or if it is tranny or throttle component related. I did notice it happen in OD so I doubt torque converter. Also, I had tranny serviced for PCS issue back in March and Transmission shop stated everything else was working fine mechanically.

In terms of driving style, it tends to happen in rush hour traffic when I am on and of the accelerator alot. Not during normal, smooth driving.

Like I said, it is rare and there is no real pattern. I'm not too concerned yet about it.. I am one of those who is paranoid as hell about their cars.

how does it react? what does it feel like its doing?

It's like the car seems to kick back or resist...hard to describe. Very settle, but I notice it since it doesn't typically happen. Nothing that seems really wrong, just abnormal.

Very intermittent...It will happen once then not happen again.