GMC 1976 ZEO 6083 Maintenance Manual page 454

7- 6
TRANSMISSION
1-2 Accumulator Valve
PRESS . REG . BORE
MODULATOR BORE
GOVERNOR
INTAKE
MODULATOR
8 INTERMEDIATE
FRONT SERVO AREA
DRIVE
INTERMEDIATE CLUTCH
Regulates drive oil to a proportional lesser value
that increases as modulator pressure increases, to
control engagement of the intermediate clutch .
Figure 5-Case Oil Passages-Bottom
Detent Valve
Shifts when line oil is exhausted at the end of the
valve when the detent solenoid is energized. This
directs detent oil to the 1-2 and 2-3 modulator valves
and allows the detent regulator valve to regulate .
PIN
LOBE (FROM COOLER)
CONVERTER RETURN
(TO COOLER)
LINE
INTAKE
ONVERTER FEED
VOID' .
VENT
REVERSE
MODULATOR $& INTERMEDIATE
40
A-4324
Figure 6-Case Oil Passages-Rear