Reverse equipment is often marked 'R' within the selector. The ahead-generate clutch is disengaged and the first ring equipment freewheels. The change valve is pressurized with fluid within the governor on 1 aspect, plus the throttle valve on the other. They can be provided with fluid because of the pump, https://simonpdoxg.thenerdsblog.com/39563590/how-much-you-need-to-expect-you-ll-pay-for-a-good-gearbox-auto