ok you need to be A LOT more specific here
are you hittin the clutch and trying to change gears and cant?
OR
is the engine itself (car) hesitating under accelration.

We need to isolate the problem here...if its a tranny problem it will be either gear specific or constant...If its an engine problem it will be present under acceleration only...If you are close to me...let me know ill meet up.

~Kris