LR3/Disco 3
The output shaft speed sensor is located at the rear of the transmission and measures the speed of the transmission
output shaft.
The transfer box is designed to allow range changes when the vehicle is moving, providing the transmission speed
complies with the preset thresholds determined by the control module. The control module calculates the optimised
synchronization timing through the speed of the transmission output shaft and the wheel speed of the vehicle. For
additional information, refer to
Manual Transmission
(308-03 Manual Transmission/Transaxle - 2.7L Diesel)
Range Change Selection Switch
The range change selection switch in located behind the main transmission selection lever, in the centre console. The
switch is a 3-position momentary action centre sprung device. The driver pushes the lever forward to select high range
and back to select low range.
The switch comprises a housing, which provides the location for a sliding contact. When the switch is moved to the high
or low position, it completes a momentary connection to 12V with one of two micro-switches located at each end of the
range change selection switch. These micro-switches correspond to the high or low range positions.
The transfer box control module receives this momentary signal and selects the requested range.
In this position, a spring will move the selector lever to the centre position when released.
High/Low Position Sensor
