Transmission ID

AVAILABLE TRANSMISSIONS
Manual 5 Speed [1] AX15
Automatic [2] 42RE

REMARKS
[1] The AX 15 is a five speed, synchromesh, manual transmission. Fifth gear is an overdrive range with a ratio of 0.79:1. The shift mechanism is integral and mounted in the shift tower portion of the adapter housing.

[2] The Chrysler 42RE is a 4-speed, fully automatic transmission with an electronic governor.

Mechanical and hydraulic components in the 42RE are similar to those in RH series transmissions. The main difference involves the method of producing governor pressure for shift control. The 42RE uses electronic components to develop governor pressure. A mechanical governor is used to generate governor pressure in the RH series.

First through third gear ranges are provided by the clutches, bands, overrunning clutch and planetary gear sets in the transmission unit. Fourth gear range is provided by the overdrive unit which contains an overdrive clutch, direct clutch, planetary gear set and overrunning clutch.

The overdrive clutch is applied in fourth gear only. The direct clutch is applied in all ranges except fourth gear.

The 42RE valve body transfer plate is different. It is designed to accept a governor body and different hydraulic circuitry. The governor pressure solenoid valve and sensor are mounted in this body The transfer plate channels line pressure to the solenoid valve through the governor body. It also channels governor pressure from the solenoid valve to the governor circuit. It is the solenoid valve that develops necessary governor pressure.

The 42RE overdrive unit is different from previous overdrive units. It is shorter in length as a result of eliminating the mechanical governor assembly including the governor tubes and governor support.