sounds like hes got 3 washers in the accumulator,thatll cause it to shift hard as a b***c and break alot of things,and add line pressure.did he use the hd 2 kit?my truck in one of the trannies,my mechnic had too take out all but one washer ,to get it too shift easier,and stop breaking things.also there was a thread not long ago,and farmtruck our local tuner said dont use any washers and just up the line pressure through the tune.wich it sounds like predator can do that for you.good luck hope it helps.you can break alot of things if the shiftkit is installed wrong.