if the clutch is destroyed THAN it was applyed all the time

or you did not assemble it correctly and or their was no clearence for the clutches

did you set the clutch end play in the pack ????

their should be two clutch drums and 2 bands is this the unit its been a while but i think that is what the 3 speed had

i might be able to walk you through the unit have not seen one in a while but its all the same stuff - did you dissessemble the valve body and attempt to clean it up

and how did you clean the trans FLUID AND AIR --- or something else and most of all did you use any rags to wipe it out AT ALL -- jz