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DRIVE RANGE - LOW (FIRST GEAR)
Intermediate Clutch - OFF
Direct Clutch - OFF
Forward Clutch - ON
Low and Reverse Clutch - OFF
Intermediate Overrun Roller Clutch - INEFFECTIVE
Low and Reverse Roller Clutch - LOCKED
Intermediate Overrun Band - OFF
Line pressure is fed to the:
1. Modulator Valve
2. 1-2 Accumulator Piston
3. Detent Pressure Regulator Valve
4. Manual Valve
From the manual control valve line pressure forms drive oil and is fed to the:
1. Forward Clutch
2. Governor
3. 1-2 Shift Valve
Basic
When the selector lever is moved to the drive position, the manual valve
directs line pressure to the R.N.D. and drive ports. R.N.D. pressure strokes the
2-3 accumulator so that it is prepared to cushion the 2-3 clutch for an upshift.
The 1-2 accumulator has already been stroked with line oil to prepare it to
cushion the 1-2 clutch.
Drive oil applies the forward clutch, feeds the governor and also the 1-2 and
2-3 shift valves.
Summary
Drive oil is directed to the forward clutch and is regulated to a variable
pressure called governor pressure at the governor assembly.
Governor pressure increases with car speed and acts against the ends of the
1-2 and 2-3 shift valves, and the modulator valve.
