Discovery II
AUTOMATIC GEARBOX - ZF4HP22 - 24
44-8
DESCRIPTION AND OPERATION
Gearbox housing
The gearbox housing contains two epicyclic gear sets on input and output shafts. Hydraulic brake clutches on the
shafts, control which elements of the gear sets are engaged, and their direction of rotation, to produce the P and N
selections, four forward gear ratios and one reverse gear ratio.
Gear ratios
Gear
Ratio
1st
2.480 : 1
2nd
1.480 : 1
3rd
1.000 : 1
4th
0.728 : 1
Reverse
2.086 : 1