Special heavy duty transmission designed for these engines: https://modsbase.com/lpmwmqk98w51/60_series.scs.html Detroit Diesel 60 650S, Detroit Diesel 60 710S, Detroit Diesel 60 860V by Vanta Cylindrics 24 Forward 4 Reverse You may want to remap your shifter Credits : Original Mod File by murcielago90, cingolato90 , reworked and rewritten by me 1.38+