Low/Reverse Clutch Hydraulic Circuits
When the low/reverse clutch is applied in REVERSE, LINE pressure from the pump is directed to the multiplex shift valve by the manual valve through the REV hydraulic circuit to move the valve. Line pressure is also supplied to the low/reverse/overdrive (4, 5, 6) clutch regulator valve from the pump. The low/reverse/overdrive (4, 5, 6) clutch regulator valve is controlled by SSD and directs regulated pressure to the multiplex shift valve. The multiplex shift valve directs the regulated pressure to the low/reverse clutch through the CBLR SUPPLY circuit.
When the low/reverse clutch is applied in PARK, LOW, or 1st gear below 5 km/h (3 mph), SSE pressure is supplied to the multiplex shift valve to move the valve. LINE pressure is supplied to the low/reverse/overdrive (4, 5, 6) clutch regulator valve from the pump. The low/reverse/overdrive (4, 5, 6) clutch regulator valve is controlled by SSD and directs regulated pressure to the multiplex shift valve. The multiplex shift valve directs the regulated pressure to the low/reverse clutch through the CBLR SUPPLY circuit.
When the low/reverse clutch is released in 4th, 5th and 6th gear, LINE pressure is supplied to the low/reverse/overdrive (4, 5, 6) clutch regulator valve from the pump. The low/reverse/overdrive (4, 5, 6) clutch regulator valve is controlled by SSD and directs regulated pressure to the multiplex shift valve. The multiplex shift valve directs the regulated pressure to the multiplex manual valve and is then directed to the overdrive (4, 5, 6) clutch.
When the low/reverse clutch is released in 1st (above 5 km/h [3 mph]), 2nd and 3rd gear, LINE pressure is supplied to the low/reverse/overdrive (4, 5, 6) clutch regulator valve. Solenoid pressure is not applied to the low/reverse/overdrive (4, 5, 6) clutch regulator valve and the regulator valve blocks regulated LINE pressure to the multiplex shift valve assembly.