Position

The PCM turns the shift solenoid valves A ON and B OFF and modulator (SH B) pressure (6B) is applies to the right side of the 1-2 shift valve and to the left side of the 2-3 shift valve. Line pressure (3) passed through the manual valve flows to the 1-2 shift valve and changed to line pressure (3'). Line pressure (3') pushes the servo valve to the reverse/park position, passes through the servo valve and flows to the manual valve. Line pressure (3') becomes the 4th clutch pressure (40) at the manual valve. The 4th clutch pressure (40) is applied to the 4th clutch and the 4th clutch is engaged.

Reverse Inhibitor Control

When the position is selected while the vehicle is moving forward at speed over 6 mph (10 km/h), the PCM outputs the 1st speed signal to shift solenoid valves A and B; shift solenoid valve A is OFF and shift solenoid valve B is turned ON. The 1-2 shift valve is moved to the right side and covers the port to stop line pressure (3') to the servo valve. Line pressure (3') is not applied to the servo valve and the 4th clutch pressure (40) is not applied to the 4th clutch. Power is not transmitted to the reverse direction.

NOTE:

• When used, ''left'' or ''right'' indicates direction on the hydraulic circuit.
• There are 4 hydraulic circuits; 6-position, 6-position with 3rd sub accumulator, 7-position and 7-position with the 3rd sub accumulator. The illustration shows the 7-position transmission circuit; 6-position circuit does not include 1st-hold clutch line.