Automatic Transmission/Transaxle: Description and Operation

Fig.3 Cross-sectional View Of 4T60-E Automatic Transaxle.:

DESCRIPTION
The 4T60-E transaxle Fig. 2 is a fully automatic unit which provides four forward speeds including an overdrive top gear. The transmission unit includes a three element hydraulic torque converter and lock-up clutching element, four multiple disc clutch, two bands and a compound reaction planetary gear set, Power transmitted to the drive wheels from the planetary gear through a final drive gear set and differential assembly.

OPERATION
The converter is designed to provide torque multiplication during acceleration and at slow vehicle speed, and lock-up during normal operation for increase operating economy. Operation of the converter lock-up is controlled automatically by the engine fuel system electronic control module. In addition, the converter drives the vane type oil pump by means of a shaft splined to the converter cover. The torque converter hydraulically couples the engine to the planetary gears through a turbine and shaft assembly which drives the transmission output shaft by means of a drive link chain and sprockets.