It is most obvious when slowing down to make turns and then going accelerating. This could be anything from a low fluid level to slipping bands or clutches. A small amount of metal particles is acceptable and considered normal. Any friction material or rubber chunks is a no, no. If the pan inspection is good then have the transmission power flushed.
Filters have a tendency to implode causing a restriction.
Check the owners manual. Oldsmobile Cutlass Supreme - Shifting gears pulls lots of power from the engine. I can park the car for a little while and it will stop until I drive it 5-10 miles and it starts again. I've been told that I may need a new torque converter but before I go and replace that I would like someone else's opinion. I also had the car up on a lift today to fix an exhaust leak and I noticed that the whole bottom side cover that covers the torque converter and flywheel was missing.