Okay so I have a 2006 acura tl and im having a prob with the tranny it shakes a little when it goes from 1st to second gear, and it doesn't shake through any of the other gears, and also the shake seems to go away if I accelerate harder, Please help!!

 

I'm going to assume this is an auto. For a shudder on the 1-2 shift, about the only thing that can be done is swapping the fluid to a DexIII or Type F fluid. You didn't mention any sort of service history. The pressure switches are highly recommended for overall longevity.

 

^^ +1