• With the shift solenoid C OFF, line pressure (17) becomes equal to line pressure (1), surpassing the combination of spring force and line pressure (7). As a result, the valve is pushed to the left side and moves to 3GR position. With the valve in 3GR position, line pressure (1) joins line pressure (16), engaging the coasting clutch through the 2-3 shift valve. When vehicle speed becomes high, the PCM turns ON the shift solenoid C, allowing line pressure (17) to be drained from the shift solenoid C. Consequently, the combination of spring force and line pressure (7) push the valve to the right side, shifting to 4GR. With the valve in 4GR position, (15) is drained, releasing the coasting clutch and engaging the 2-4 brake band.
.
|
1
|
To 1-2 accumulator
|
|
2
|
To 2-3 shift valve
|
|
3
|
From pressure regulator valve
|
|
4
|
From manual valve
|
|
5
|
Shift solenoid C: OFF
|
|
6
|
3GR position
|
|
7
|
Shift solenoid C: ON
|
|
8
|
4GR position
|