68RFE automatic transmission equipped trucks have the option to order transmission tuning. With an electronically controlled transmission factors such as converter lockup, line pressure, and shift patterns can be supremely adjusted. Our TCM tuning is highly recommended to preserver to longevity of your transmission at higher HP and TQ.
We recommend this for all A50 & T87 controllers. It has an aggressive Line PSI slope which will model a torque curve 100% above stock. The line PSI is modified in such a way that the truck will still retain good mileage yet hold high line psi (close to 245-300psi under full load) following this torque curve. Line PSI is increased across the board, so as a result, fuel economy may be lower in some cases.