Second Gear

SECOND GEAR
The driving force of the turbine shaft is transmitted to the reverse and forward drum and then to the one-way clutch outer race through the forward clutch. One-way clutch 1 transmits this driving force to the small sun gear, causing the gear to rotate counterclockwise.
The large sun gear, however, is locked by the 2-4 brake band and thus does not rotate.
As a result, the internal gear rotates counterclockwise due to the planetary gear set operation. It rotates than the first gear, and the driving force is transmitted to the driving wheels.

D RANGE
During deceleration, engine braking does not operate because one-way clutch 1 freewheels, similar to driving in first gear of D range.

2 RANGE
During deceleration, engine braking operates by the coasting clutch operation, similar to driving in the first gear of 1 range.





Hydraulic pressure operation
Line pressure (7) generated in the oil pump is adjusted by the pressure regulator valve and transmitted to the manual valve, throttle valve, 1-2 shift valve, 2-3 shift valve, 3-4 shift valve, torque converter clutch control valve, 1-2 accumulator, 2-3 accumulator, and N-D accumulator.
Due to the manual valve position, line pressure (7) is transmitted to (1) and (3). Line pressure (1) works on the 1-2 shift valve, 3-4 shift valve, and N-D accumulator, and engages the forward clutch.
At that moment, shift solenoid A is ON, and line pressure (1) is transmitted to (9). Due to the 1-2 shift valve and the 1-2 accumulator operation, line pressure (9) works on the 2-4 brake applied side, engaging the 2-4 brake band, Line pressure (3) works on the 2-3 shift valve.
Line pressure (7) driven to the pressure regulator valve, is transmitted to torque converter pressure (23) and sent to the torque converter through the torque converter clutch control valve.
When 2 range is selected, shift solenoid C is OFF and line pressure (1) engages the coasting clutch due to the 3-4 shift valve operation.