[Tom Goldman]

Pull the valve body down and check the case with a straight edge to make sure the case is flat. ....any distortion can cause leakage across the channels. ..............It is more likely that you have a pump issue , since the problem has ocoured with two different valve bodies......internal leakage in the pump from the foward clutch passage to the direct passage will give you high gear. .....Reverse will function normally because the foward clutches are turned off and the direct clutch is applied. ........I'd find someone who is familiar with performance 350's and have them take a look at it,and spend the time with your kid!.....Tom