General Description

^ The 4-speed electronic automatic transaxle (4EAT) features a combination of electronic and mechanical systems for controlling forward gear shifting, torque converter lockup for quietness and economy, and self-diagnosis capability for simplifying troubleshooting procedures.
^ Unique mechanical features of the 4EAT include a single, compact, combination-type planetary gear set (4-speed capability). Also unique is a variable-capacity oil pump, which controls flow rate at and above a medium speed, and reduces the power losses resulting from pumping more oil than necessary at higher speeds.
^ The electronic system controls the Transaxle shifting in forward speeds and torque converter lockup by means of solenoid valves. These solenoid valves, when energized (ON), activate friction elements (clutches and bands) to control shifting the planetary gear set. The shift timing and lockup events are regulated by the power train control module (PCM) in programmed logic and in response to input sensors and switches in order to produce optimum drive ability.