1989-1993 5.9L Dodge Cummins
Automatic Transmission | Torque Converters | Valve Bodies

With the marrying of a Dodge pickup and a Cummins power plant in 1989 came rave reviews and ecstatic customers.  And while the engine had already proven itself in other applications, the mating of this engine to an automatic transmission proved to be problematic. The torque realized from the 5.9L Cummins pushed the limits of the 3-speed automatic in the 727 and even the 518 with overdrive. For  those looking to upgrade for improved drivability and even greater life expectancy, we have several options that can help you to realize the potential of the engine by transferring most of the torque to the ground, instead of getting lost in the transmission.