LR3/Disco 3
Engine torque is transferred, via operation of single or combinations of clutches to the two planetary gear trains. Both
gear trains are controlled by reactionary inputs from brake clutches to produce the six forward gears and one reverse
gear. The ratios are as follows:
The following table shows which solenoids are activated to produce the required torque output from the transmission.
The following table shows which clutches are operating for selected gear ratios to produce the required torque output
from the transmission.
Shift Elements
E
-
Multiplate clutch
Gear 1st
2nd
3rd
4th
5th
6th Reverse
Ratio 4.171 2.340 1.521 1.143 0.867 0.691 3.403
Gear Selector Lever Position
Shift Control
Solenoid Valve
Electronic Pressure Regulator
Solenoids (EPRS)
1
2
3
4
5
6
P
ON
-ON-
R
ON
ON
-ON-
N
ON
-ON-
D 1
ON
ON
-ON-
-ON-
D 2
ON
ON
-ON-
-ON-
D 3
ON
ON
-ON-
-ON-
D 4
ON
ON
ON
-ON-
-ON-
D 5
ON
ON
ON
-ON-
-ON-
D 6
ON
ON
ON
-ON-
-ON-
ON = Active (pressure build up) OFF = Inactive -ON-
= Inactive (pressure drain)
Gear Selector Lever Position Shift Control Solenoid Valve
Clutch
Brake
A B E WK C D
P
X
R
X
X
N
X
D 1
X
X
X
D 2
X
X
X
D 3
X X
X
D 4
ON
X X X
D 5
ON
X X X
D 6
ON
X X
X
X = clutch applied
