Ok, its a '94 Tbird 4.6 with 72k. Original motor/trans. It had some tc slippage but new fluid and filter fixed that. When driving on the highway or city streets, it seems like the car is lunging forward and doesnt cruise smoothly. Acceleration seems ok, but the performance isnt there. The lunging is evident at many speeds and does not occur right before shifting. It shifts like it should. It almost seems like its trying to slip out of the gear but doesnt. The RPMs are steady and don't surge. I am guessing tc/trans problem? Maybe ****ty MAF sensor? I cleaned it and it seems fine. Maybe a crappy spark plug or a miss? There are also no check engine lights. Any ideas? Thanks.