I would pm redheartbeat...greg....Idk if you can or cant use a 700r4 with the newer 6.0 or if you need and older one. maybe its the th400 that needs the older one.
2000 Silverado ECSB- 5.3 CAI, Pacesetter LTs, ORY- Pipe, Magnaflow XL, E-fan, Ported T/B , Nelson Tuned, Built 4l60e, Circle D Stall, 3.42s G80, 2-4 Drop, Hertz Highs, Rockford 501s