Dodge Sprinter. Manual — part 266
2-1 Shift - First Gear Engaged
After the gear change is complete, the 1-2/4-5 shift
solenoid (1) (Fig. 22) is turned off. This reduces the
pressure on the end face of the 1-2/4-5 command
valve (5) to 0 psi and the spring pressure downshifts
the valve to its initial position. The line pressure
(p-A) is switched to the holding clutch B1 (7) and the
Fig. 22 First Gear Engaged
1 - 1-2/4-5 SHIFT SOLENOID
5 - 1-2/4-5 COMMAND VALVE
2 - 1-2/4-5 OVERLAP VALVE
6 - DRIVING CLUTCH K1
3 - 1-2/4-5 SHIFT PRESSURE SHIFT VALVE
7 - HOLDING CLUTCH B1
4 - 1-2/4-5 HOLDING PRESSURE SHIFT VALVE
8 - SHIFT PRESSURE REGULATOR VALVE
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end face of the holding valve by the downshifted com-
mand valve. The upshifted holding valve also allows
the remaining pressure in clutch K1 (6) to be vented.
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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Gear Shift N to D (1st gear) - Engine Started
With the engine started (Fig. 23) and the gearshift
lever in the NEUTRAL or PARK positions, holding
clutch B1 (1) and driving clutch K3 (4) are applied
and the various valves in the 1-2/4-5 shift group are
positioned to apply pressure to the holding clutch B2.
Fig. 23 Engine Started
1 - HOLDING CLUTCH B1
11 - PRESSURE HOLDING VALVE
2 - DRIVING CLUTCH K1
12 - 3-4 HOLDING PRESSURE SHIFT VALVE
3 - HOLDING CLUTCH B3
13 - 3-4 COMMAND VALVE
4 - DRIVING CLUTCH K3
14 - 3-4 SHIFT PRESSURE SHIFT VALVE
5 - HOLDING CLUTCH B2 PISTON
15 - 3-4 OVERLAP REGULATING VALVE
6 - HOLDING CLUTCH B2 PISTON OPPOSING FACE
16 - BALL VALVE
7 - SHIFT PRESSURE REGULATING SOLENOID
17 - 1-2/4-5 COMMAND VALVE
8 - SHIFT PRESSURE REGULATING VALVE
18 - 1-2/4-5 COMMAND VALVE
9 - SHIFT VALVE B2
19 - BALL VALVE
10 - 3-4 SHIFT SOLENOID
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Activation Sequence
The selector valve (Fig. 24) opens the shift pres-
sure (p-S) feed connection from the ball valve (19)
with the shift valve B2 (9). With the shift valve B2
(9) in the upper position, shift pressure (p-S) travels
behind the piston B2 (5) and simultaneously to the
opposing face of the piston B2 (6). The multiple-disc
holding clutch B2 begins to close.
The pressure on the opposing face of the piston B2
(6) ensures a soft activation of the multiple-disc hold-
ing clutch B2.
Fig. 24 Activation Sequence
1 - HOLDING CLUTCH B1
11 - PRESSURE HOLDING VALVE
2 - DRIVING CLUTCH K1
12 - 3-4 HOLDING PRESSURE SHIFT VALVE
3 - HOLDING CLUTCH B3
13 - 3-4 COMMAND VALVE
4 - DRIVING CLUTCH K3
14 - 3-4 SHIFT PRESSURE SHIFT VALVE
5 - HOLDING CLUTCH B2 PISTON
15 - 3-4 OVERLAP REGULATING VALVE
6 - HOLDING CLUTCH B2 PISTON OPPOSING FACE
16 - BALL VALVE
7 - SHIFT PRESSURE REGULATING SOLENOID
17 - 1-2/4-5 COMMAND VALVE
8 - SHIFT PRESSURE REGULATING VALVE
18 - 1-2/4-5 COMMAND VALVE
9 - SHIFT VALVE B2
19 - BALL VALVE
10 - 3-4 SHIFT SOLENOID
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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