Activation Sequence
The selector valve (F ig. 24) opens th e sh ift pr es-
su re (p-S) feed connection from the ball valve (19)
with th e shift valve B2 (9). With the shift valve B2
(9) in the upper position , shift pressur e (p-S) travels
behind t he piston B2 (5) an d simu lta neously to t he
opposing fa ce of the piston B2 (6). Th e multiple-disc
holding clutch B2 begins to close.
The pressur e on the opposin g face of th e piston B2
(6) en su res a soft a ctivation of the mu ltiple-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
VA AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 37
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