of back pressure, therefore, better hold back & quicker response at lower RPM's. 2 year warranty AUTO LOCK~ used with engine brakes, keeps torque convertor locked up, eliminating... slippage PRESSURE LOCK~ increases line pressure, pressing clutches tight eliminating slippage TORQUE LOCK~ 3 position switch keeping torque convertor locked as "should" be normally... in the butterfly valve as a safety release for excess back pressure. 5 year warranty BD (Big Daddy) Brake has a piston that adjusts the butterfly valve for the safety release...

) Dodge/Ford Mag-Hytech differential & transmissiion Covers*Gauges - Isspro/ Westach/ AutoMeter: pyro, boost, transmission temperature, oil pressure, combination-dual gauges, gauge cup..., glowplug controllers,glow plugs, water and vauume pumps,starters, transmission coolers,filter prime lock, chrome exhaustpipe tips - the prettier ones runbetter, new or rebuilt engines w...