L322 Range Rover System Description and Operation
AUTOMATIC TRANSMISSION – ZF 5HP24
44-2-20 DESCRIPTION AND OPERATION
One Way Free Wheel Clutch – Typical
1 Sprags
2 Inner race
3 Outer race
4 Sprag and cage assembly
5 Sprag outer race
6 Sprag inner race
7 Retaining ring
The 5HP24 transmission uses only one free wheel clutch to perform a component holding function. The free wheel
clutch, in conjunction with the hydraulic clutches, prevent disruption of the power output during shift changes. The
freewheel clutch is located at the rear of the planetary gearset and controls brake clutch 'F'.
The free wheel clutch can perform three functions; hold components stationary, drive components and free wheel
allowing components to rotate without a drive output. The free wheel clutch used in the 5HP24 transmission is of the
sprag type and comprises an inner and outer race and a sprag and cage assembly. The inner and outer races are
pressed into their related components with which they rotate. The sprag and cage assembly is located between the
inner and outer races.
The sprags are located in a cage which is a spring which holds the sprags in the 'wedge' direction and maintains them
in contact with the inner and outer races.
