Mechanic Job in Bryant, Arkansas

I wrecked the front of my car into the back of another. It seemed to run okay for a few days, but now has trouble shifting up and accelerating in general, particularly from a stop. I've tried to diagnose the problem myself, but I'm at a loss. I believe it may be the transmission or trans lines leaking somewhere. I would like to figure out what it is first, and we can go from there.