Models Without PWM Solenoid

Drive Range - Manual Third (From Overdrive Fourth Gear) (Models Without Pressure Switches):

DRIVE RANGE - MANUAL THIRD (From OVERDRIVE RANGE FOURTH GEAR)

"A"SHIFT SOLENOID - OFF
SECOND CLUTCH - APPLIED
1/2 SUPPORT ROLLER CLUTCH - OVERRUNNING
"B" SHIFT SOLENOID - OFF
THIRD CLUTCH - APPLIED
FORWARD BAND - APPLIED
INPUT CLUTCH - APPLIED
THIRD ROLLER CLUTCH - HOLDING

When the gear selector lever is moved to the DRIVE RANGE (D), the manual valve (404) allows line pressure to enter the D-3 passage. D-3 fluid is then directed to the 3-4 shift valve (362) and moves the valve against "A" shift solenoid pressure. D-3 fluid is also sent to the 2-3 shift valve (357) where it enters the input clutch feed passage. Input clutch feed fluid passes through the 3-4 shift valve (362) into the input clutch passage, seats No. 3 checkball (372) against the PRN passage and applies the input clutch. 4th clutch apply fluid at the 4th clutch, is directed to the 3A accumulator assembly (421-428) to the No. 10 checkball (372). Exhausting 4th clutch fluid seats the No. 10 checkball (372) against the 4th passage directing fluid through an exhaust orifice up to the 3-4 shift valve (362) where it exhausts. Since D-3 fluid overrides "A" shift solenoid fluid at the 3-4 shift valve (362), a manual 4-3 downshift will result even if "A" shift solenoid is "energized" or "turned on" (Drive range 4th gear solenoid state:is "A" shift solenoid on and "B" shift solenoid off). If the PCM receives the appropriate input signals from the VS Sensor and TP Sensor, "A" shift solenoid will "de-energize or "turn off" and "A" shift solenoid fluid will then exhaust through the solenoid.

Manual Valve (404): Is moved by the gear selector lever and allowing line pressure to enter the D-3 passage.

2-3 Shift Valve (357): Allows D-3 fluid to enter the input clutch feed passage and directs it to the 3-4 shift valve (362).

3-4 Shift Valve (362): Is downshifted when D-3 fluid is fed to the valve. In this position input clutch feed fluid enters the input clutch passage.

No. 3 Checkball (372): Located in the channel plate (400), it is seated against the PRN passage allowing input clutch fluid to apply the input clutch.

No. 10 Checkball (372): Located in the valve body (300), it is seated against 4th fluid allowing 4th clutch fluid to exhaust at the 3-4 shift valve (362).

"A" Shift Solenoid (315): When de-energized, it allows "A" shift solenoid fluid from the 3-4 shift valve (362) to exhaust through the solenoid. However, this event does not have to occur in order to achieve a manual 4-3 downshift.