Great Wall hover, Service Manual

Page: 105 / 425

Automatic transmission-29
In reverse-Gear position, the drive of transmission is sent to the clutch hub through the input shaft and rear clutch piston. In this
condition, the description of each function unit of transmission is shown as follows:
The clutch C3 is engaged and drive the reverse central gear to rotate in clockwise.
The engagement of B2 brake belt cause the rest of the planetary gear carrier, then make the long planetary gear rotates
around its shaft anticlockwise.
The long planetary gear drives the internal gear ring rotates anticlockwise .
Use the spline to connect the inner gear ring to the output shaft and drive the gear ring rotate anticlockwise or in reverse.
Control:
In stable status, to maintain the arrangement, the action of solenoid valve and valve is shown as follows:
A solenoid valve S1 or S2 is closed at least. (Refer to the part in section 3.3.11, related to condition when S1 and S2 is
closed.)
The line pressure reaches the internal surface and external surface of rear servo piston through the reverse lock valve
directly.
The line pressure urges the reverse-Gear loop oil pass through the manual-operated valve.
The reverse-Gear loop oil is circuited to clutch C3 through the manual-operated valve.
In the transmission whiteout HP pump shell, the reverse-Gear loop also can reaches the spring end of the primary
regulating valve to support the spring and push the line-pressure regulating valve.
The oil loop of execution line of all other clutches and brake belts is opened to leaking port.
Refer to Figure 5.2 and Table 5.3
.
Table 5.3 The participating condition of each unit in reverse-Gear position
Gear-position
Reverse gear
Name of participated unit