b. Forward-Reverse Inhibitor Hydraulic Circuit (fig. 1-49). The
forward and reverse valves determine the direction of transmission
A solenoid controls each of the spring loaded valves,
The forward-reverse inhibitor prevents the transmission from making
forced directional changes at excessive speed. Output speed governor
(G2) pressure opposes the spring pressure to prevent movement of the
forward shift valve flow and flow of the hydraulic fluid within the
Forward, Reverse, and Inhibitor Valve Circuit.
The priority valve receives
oil from the neutral shift valve and directs it to the shift valves.
range control due to the high flow demand when applying a range
clutch. During braking operations, brake apply pressure assists the
spring end of this valve to maintain the same amount of pressure
passing through the valve.