I changed the fluid and filter, fluid was not clear but not a burnt smell either, looked like it was time to change it. Drained the torque converter as well. Shifted normally but then tonight after I started the car and drove down a small hill and not trying to accelerate it was like the trans was out of gear for a brief moment. I stopped and tried to get it to do it again and it didn't. I did many starts and stops going on level, up hill and down and it shifted normally with no slippage, kickdown shift worked as it should Test drove for 20 minutes and it shifted perfectly. No vacuum leak to the modulator. Maybe running with new fluid for awhile will clear this problem up? Thought it might by the B2 piston but not sure. Should I run a cleaner in the trans for awhile? If so what is one that is recomended