http://www.peachparts.com/shopforum/diesel-discussion/385196-valve-body.html
The above link was a thread started back in april of this yr and connects this issue as a good indicator to other possible transmission culpriepts when it comes to examining the olde no forward gears but reverse gear still working scenerio .Rollguy after extensive issues also found this through his transmission shop.http://www.peachparts.com/shopforum/diesel-discussion/385909-300td-b2-piston-replaced-still-no-forward-movement.html