Neutral-Engine Running

In this range, all the clutches and the band are released, and the transmission is in Neutral.

With selector lever in Neutral position the manual valve is positioned so that line pressure enters two passages. The first is the reverse, neutral, drive, intermediate (RNDI) passage. RNDI oil is directed to seat RNDI and detent check ball (6) and to the throttle valve where it is regulated to a variable pressure called throttle valve (T.V.) pressure. T.V. pressure increases with carburetor opening and is directed to the shift throttle valve. This valve limits shift T.V. oil pressure from exceeding 90 psi.

Shift T.V. oil is then directed to the 1-2 and 2-3 throttle valves, T.V. boost valve, T.V. plunger and the 1-2 accumulator valve Shift T.V. oil acting on the T.V. boost valve will boost line pressure according to throttle opening. The second is the reverse, neutral, drive (RND) passage and is directed to a land on the 2-3 shift valve.