New Rebuild No forward gears

Does that billet input drum say what years of 727 it works with? if he just air checked it once built and assembled in the case it will sound kinda funny but may thought it was ok. I always check them both on the pump on the bench before its in the case to see & hear it apply correctly. if sealed correctly it takes very little psi to apply any of them. Hope it is somthen easy man! fyi that 71-up pump should have 3 seal ring if i recall check to see if yer billet input is the same.