First Gear (1 Range)

FIRST GEAR (1 RANGE)
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 pinion gear of the planetary gear, however, does not revolve around the sun gear because the planetary carrier is locked by the low and reverse brake.
As a result, the internal gear rotates counterclockwise due to the planetary gear set operation, and the driving force is transmitted to the driving wheels.
During deceleration, engine braking operates by the coasting clutch engagement.





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 (5). Line pressure (1) works on the 1-2 shift valve, 3-4 shift valve, and N-D accumulator, and engages the forward clutch and coasting clutch.
Line pressure (5) regulates low reducing pressure (10) due to the low reducing valve operation. Low reducing pressure (10) works on the 1-2 shift valve, and engages the low and reverse brake. 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.