Four automatic transaxle units are available. The ATX (automatic transaxle) model which is used with the 2.5L engine, and the AXOD (automatic transaxle overdrive) which is used with the 3.0L and 3.8L engine. Beginning in 1991 some vehicles were equipped with the AXOD-E transaxle which is basically the same as the AXOD with the addition of electronic transaxle controls. Beginning in 1993, some vehicles came equipped with the AX4S (automatic transaxle four-speed) or AX4N (automatic transaxle four-speed non-synchronized) transaxle. The AX4S was formerly the AXOD and is basically the same as the AXOD-E. And the AX4N which is also very similar, but is non-synchronized, hence the N in the name.
The ATX automatic transaxle is a 3-speed unit. A unique feature is a patented split path torque converter. The engine torque in second and third gears is divided, so that part of the engine torque is transmitted hydrokinetically through the torque converter, and part is transmitted mechanically by direct connection of the engine and transaxle. In the third gear, 93% of the torque is transmitted mechanically, making the ATX highly efficient. Torque splitting is accomplished through a splitter gear set. A conventional compound gear set is also used.
Only one band is used in the ATX. In service fluid additions, or fluid changes may be made with Motorcraft Type H automatic transmission fluid.
The AXOD, AXOD-E, AX4S and AX4N automatic transaxles are 4-speed units. They all have two planetary gear sets and a combination planetary/differential gear set. Four multiple plate clutches, two band assemblies, and two one-way clutches act together for proper operation of the planetary gear sets.
A lock-up torque converter is coupled to the engine crankshaft and transmits engine power to the gear train by means of a drive link assembly (chain) that connects the drive and the driven sprockets. The application of the converter clutch is controlled through an electronic control integrated in the on-board EEC-IV system computer. These controls, along with the hydraulic controls in the valve body, operate a piston plate clutch in the torque converter to provide improved fuel economy by eliminating converter slip when applied.
In-service fluid additions, or fluid changes, may be made with Motorcraft Type H automatic transmission fluid.
The AXOD-E uses a turbine speed sensor in conjunction with a vehicle electronic control system. These components send operational signals to the EEC-IV microprocessor.