My buddy Bought a 99 around 6 months ago, was told that the trans had been rebuilt with new BD converter, billet input, billet output, valve body etc. Truck was doing fine for the exception of the trans taking a little longer to shift than I expected but other than that no problems. Fast forward to last weekend I installed DAP 225 hp injectors,head studs,Borg Warner box 64,ts comp fuel box and Fass 150 with Fass fuel sump. Fired the truck up ran good, go to drive the truck around and the truck shuts off when I put it in drive. Put it back in park and try again and the same problem occurred, first thing that came to mind was maybe the converter but it didn't act up before so I'm not sure why it would all of a sudden. Any input is appreciated,Thanks