L322 Range Rover System Description and Operation
AUTOMATIC TRANSMISSION – ZF 5HP24
DESCRIPTION AND OPERATION 44-2-21
Referring to the illustration, the sprags are designed so that the dimension 'B' is larger than the distance between the
inner and outer race bearing surfaces. When the outer race rotates in a clockwise direction, the sprags twist and the
edges across the dimension 'B' wedge between the races, providing a positive drive through each sprag to the inner
race. The dimension 'A' is smaller than the distance between the inner and outer race bearing surfaces. When the
outer race rotates in an anti-clockwise direction, the dimension 'A' is too small to allow the sprags to wedge between
the races, allowing the outer race to rotate freely.
On the illustration shown, when the outer race is rotated in a clockwise direction, the sprags twist and are 'wedged'
between the inner and outer races. The sprags then transfer the rotation of the outer race to the inner race, which
rotates at the same speed.