I should have posted that I did the filter and gasket. I also drained the torque. I did put a quart of Trans X and it does shift better. But when I still had the 4th gear problem I had to post. Hoping the someone would know a fix. I also think its the shifting body. The car shifts fine, its just when I come off of the highway or anytime I hit 4th gear, and come to a stop. The tranny doesn't engage until i rev the engine and then I get a knock and I have full power in all gears. If I drive to a slow stop and shift to S it will down shift normal or it will rev at that point and engage at that point so when I stop I have power. That has been what I've been doing. Thanks for all your help. Any more info would be great. Oh and yes the fluid is fine and as far as a Vac problem. I have great vac. and I changed the Vac. mod, last year also I bypassed the EGR so the tranny shift great, just that one problem.