one thing i found is that there is supposed to be a small metal rod on the gear that catches the arm on the 2 speed shifter. i found that this is usually not there and the shifter arm beats the plastic after a few times and either the trans gets stuck in first or second gear, what i did is cut a piece of a body clip (the straight end of it) and stick it in the hole that is in the gear in front of the hump and put some CA on it and accelerator and it works fine or at least like it should.