Automatic Transmission/Transaxle: Description and Operation

Circuit Diagram





Cross-sectional View





Hydraulic Control Circuit

Shift Mechanism
The automatic transmission uses compact, dual planetary gear systems to improve power-transmission efficiency, simplify construction and reduce weight. It also employs an optimum shift control and superwide gear ratios. They improve starting performance and acceleration during medium and high-speed operation. Two one-way clutches are also employed: one is used for the forward clutch and the other for the low clutch. These one-way clutches, combined with four accumulators, reduce shifting shock to a minimum.





CONSTRUCTION





FUNCTION OF CLUTCH AND BRAKE





CLUTCH AND BAND CHART
D: Operates when throttle opening is less than 3/16, but does not affect engine brake.

POWER TRANSMISSION
P and N Positions





- P position
Similar to the N position, no control members operated. The parking pawl interconnected with the select lever engages with the parking gear to mechanically hold the output shaft so that the power train is locked.
- N position
No control members operated. Power from the input shaft is not transmitted to the output shaft since the clutch does not operate.





1 1 Position





D 1, and 2 1 Positions





D 2, 2 2 and 1 2 Positions





D 3 Position





D 4 (O/D) Position





R Position