The Ford 6R140 transmission varies line pressure between 70 and 170 psi. This works well for stock trucks but for heavy duty use and higher horsepower applications this may be insufficient. BD's PressureLoc for the 6R140 is a solenoid replacement that overrides the transmission line pressure to maximize output enabling the transmission to handle higher horsepower. The BD PressureLoc will allow the transmission to produce 250 - 300psi, substantially increasing clutch holding power which prevents clutch slippage and premature clutch failure.