I have forward hear..when I putle we to neutral it wants to move in reverse slightly,when I'm reverse it starts to move them stops...had valve body off and Valvea..didn't see any thing obvious..but some on has had it apart....I swapped rev amnd forward valves and selonoids...I have power to them in reverse and fioward....the emblem on the side says it is a gtd060.....can any one steer me in the right direction...maybe flow chart,parts list to see if valves. Are in right