727 Valve body

It only has 1st and reverse, my dad tore apart the tranny (cuz im away at college) and he said the clutches and everything looked good, but we had to send off our torque converter to get rebuilt b/c there were shavings in the pan and the guys at Edge converter said there wasnt anything wrong with the converter, so he tore apart the valve body and didnt find anything wrong with it, so i dont know what the deal was. Any ideas?