Preventing 48RE Transmission Throttle-Valve-Actuator Codes
In 2005, Dodge started using a transmission throttle-valve actuator (TTVA) instead of a TV cable on the 48RE diesel 2500 and 3500 Ram trucks. The actuator, attached to the case above the throttle-valve shaft, includes two potentiometers that provide input to the ECM as well as a DC motor that responds to ECM output. The bottom of the TTVA shaft features a D-shaped opening that fits onto the throttle shaft, allowing the actuator to mechanically stoke the TV valve and ultimately control transmission throttle pressure.
