Third Gear

THIRD GEAR
The driving force of the turbine shaft is transmitted to the reverse and forward drum and causes the small sun gear to rotate counterclockwise through the forward clutch, one-way clutch 1 and coasting clutch.
However, during start-up of the second to third gear shifting the coasting clutch is not yet engaged. Thus, the driving force uses the forward clutch and one-way clutch 1 for the counterclockwise rotation of the small sun gear. This driving force is also transmitted to the planetary carrier through the 3-4 clutch, making it rotate counterclockwise.
As a result, because the small sun gear and the planetary carrier rotate counterclockwise at the same speed, the internal gear rotates faster than second gear.
The driving force is transmitted to the driving wheels.
During deceleration, engine braking operates by 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 (3). Line pressure (1) works on the 1-2 shift valve, 3-4 shift valve, and N-D accumulator, and engages the forward clutch. Line pressure (3) works on the 2-3 shift valve.
With the shift solenoid B OFF line pressure (3) is transmitted to (13) due to the 2-3 shift valve operation. Line pressure (13) works on the bypass valve to quicken the start-up of the 3-4 clutch application pressure. When the path from (13) to (18) in the bypass valve closes, line pressure (13) goes through the orifice check ball from (13) to (18) in the bypass valve closes, line pressure (13) goes through the orifice check ball to work on the 2-3 accumulator, slowly increasing 3-4 clutch application pressure.
With shift solenoid C OFF, line pressure (1) is transmitted to (16) due to the 3-4 shift valve. Line pressure (16) engages the coasting clutch. Line pressure (13) is transmitted to (15) and works on the 2-4 brake released side.
Line pressure (7) driven to the pressure regulator valve is transmitted torque converter pressure (23) and sent to the torque converter through the torque converter clutch control valve.
(Below 41 Km/h (25 mph))
With shift solenoid A OFF, line pressure (9) which works on the 2-4 brake applied side is drained from the 1-2 shift valve, and releases the 2-4 brake band.
(Above 43 Km/h (27 mph))
With shift solenoid A ON, line pressure (9) works on the 2-4 brake applied side. However, line pressure (15) works on the 2-4 brake released side, and the 2-4 brake band is released due to pressure applied to the difference between the surface areas of the band servo pistons.