fresh 727 problem

if the vb is out, why not do an air check of the front clutch [high/reverse clutch by function] use a rubber tip air gun and apply 60 to 100 psi to the correct apply holes in the case, listen for the "air loss" if it is excessive, problems exist and the trans should be removed for further inspection. You can check all four components which control the three forward gears and reverse very easily. If you have a mopar manual, the holes will be clearly marked. Is this a reverse shift valve body?