Low & Reverse Releases

Low & Reverse Servo 

When the 1-2 shift valve is held in the upshifted position, an exhaust port is opened. Fluid in the Low & Reverse band reduce circuit exhausts at the valve while spring force, acting on the piston, forces the servo downward. The downward movement of the servo enables the release of the Low & Reverse band.

#6 Checkball (Low & Reverse Band Apply, Reduce) 

The #6 checkball is positioned against the Low & Reverse band apply circuit. The checkball allows Reverse band fluid from the Low & Reverse servo piston to enter the Low & Reverse band reduce circuit. Fluid in the Low & Reverse band reduce circuit is then routed to the 1-2 shift valve where the fluid exhausts.