31TH 3-Speed

Fig. 1 Cross-Sectional Of Automatic Transaxle:

This transaxle combines a torque converter, three speed automatic transaxle, final drive gearing and a differential into a front wheel drive unit, Fig. 1. There are three primary areas within the transaxle: the main centerline and valve body, the transfer shaft centerline (which includes the governor and parking sprag) and the differential centerline. The torque converter, transaxle area and differential are housed in an integral aluminum die casting. The differential oil sump is common with the transaxle oil sump. Separate filling is not required.

The torque converter is connected to the crankshaft through a flexible driveplate. Converter cooling is accomplished by an oil-to-water type cooler, located in the radiator side tank. The torque converter cannot be disassembled.

The transaxle consists of two multiple disc clutches, an overrunning clutch, two servos, a hydraulic accumulator, two bands and two planetary gearsets. The common sun gear of the planetary gearsets is connected to the front clutch by a driving shell which is splined to the sun gear and front clutch retainer.

The hydraulic system consists of an oil pump and a valve body which contains all the valves except the governor valves. A lock-up converter is standard. The lock-up mode is activated only in direct drive (3rd gear) and is controlled by the engine electronics. A lock-up solenoid on the valve body transfer plate is powered by the engine control computer to activate torque converter lock-up.