tranny slipping??

i recently had a short in my dash lights, fixed that . had some wires naked that were grounding out in the pass. side running lights. now a day later all of a sudden the tranny is acting up. it acts like the motor is hesitating , spitting and sputtering but i can manually pull it down to 2nd and it will then shift out but start slipping in the other gears. i know its not the engine cuz i can also put it in neutral when it acts up and the engine does fine. its got to be the tranny right?? i just wanted to make sure the dash light short had nothing to do with it, probably a silly Q but had to ask.