589Fluid flow in reverse gear

(Figs 5.24, 5.21(a) and 5.14(a)) In reverse gear the pressure regulator valve and throttle pressure valve operate in a similar way to neutral.

With the manual selection valve in the R position, line pressure is directed to the drive and reverse clutch piston by way of the ball valves for direct and reverse clutch. Similarly, line pressure is directed through the ball valves for first and reverse gear brake to the soft engagement valve and from there to the first and reverse gear brake piston thereby engaging the clutch plates.

Whilst in reverse gear, the main pressure regulating valve provides maximum line pressure increase, this being due to there being no pressure acting on the left hand end of the valve.

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