yes i am pretty sure i did. i think it was the bigger of the 2 spur gears. the spot i said looked a little stripped was causing the pinion gears to not be able to fit in-between the notches on the spur gear causing the whole engin to push away enough so that it wouldn't spin the spur gears.

thanks every one for your advice.....and alvinl for your advice of going though all of the parts to see where the movement stopped