Intermediate Plate

The intermediate plate supports the automatic transmission input shaft and provides the interface between the transmission fluid pump and the lubrication circuit. The pump attaches to the front of the intermediate plate and is driven by an impeller in the torque converter. The pump pressurizes transmission fluid drawn from the sump in the automatic transmission housing. The pressurized fluid then circulates through the torque converter and automatic transmission housing components for cooling, lubrication and gear shift purposes. Ports around the outer periphery of the intermediate plate provide the inlet and outlet connections to the transmission fluid cooler and a pressure take-off point for servicing.

On ZF4HP24 automatic transmission, the intermediate plate is 0.6" (15 mm) thicker than fitted to the ZF4HP22 automatic transmission to accommodate a larger fluid pump unit. To compensate for the increased length of the intermediate plate, the rear extension housing is 0.6" (15 mm) shorter than that fitted to the ZF4HP22 automatic transmission.