L322 Range Rover System Description and Operation
TRANSFER BOX
41-20
DESCRIPTION AND OPERATION
Operation
General
The selection of high/low range is selected by the driver using a switch adjacent to the transmission selector lever. A
range change can only be performed when the transmission selector lever is in neutral, position 'N'. The accelerator
pedal must not be depressed when a range change is in progress.
If high or low range is requested and the transmission selector lever is a position other than 'N' or 'P', the instrument
pack message centre will display 'SELECT NEUTRAL'.
NOTE: With the transmission selector lever in 'P', the range change will not take place and the 'SELECT NEUTRAL'
message will not be displayed.
When low range is selected, the low range 'mountain' symbol will flash when the range change is taking place and
then remain illuminated when the range change is complete. The instrument pack message centre will display 'LOW
RANGE' for approximately 3 seconds followed by a chime from the instrument pack to confirm that the range change
has been completed. Only 'D' and 'Manual mode' are available on the transmission, the 'Sport mode' selection is not
available.
When high range is selected, the low range 'mountain' symbol will flash when the range change is taking place and
then extinguish when the range change is complete. The instrument pack message centre will display 'HIGH RANGE'
for approximately 3 seconds followed by a chime from the instrument pack to confirm that the range change has been
completed.
The design of the transfer box allows range changes when the vehicle is moving, within set limitations as follows:
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High to Low – at speeds not exceeding 10 mph (16 km/h)
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Low to High – at speeds not exceeding 30 mph (48 km/h).
If the vehicle speed is higher than the parameters given above, the instrument pack message centre will display
'SLOW DOWN'. When the correct speed range is reached, the message will be deleted and the range change will
commence.
A road speed of less than 2 mph (3 km/h) is interpreted by the transfer box ECU as a static shift (vehicle not moving).
In this instance the driver must use the shift lock procedure of operating the brake pedal to allow the selector lever to
be moved from 'N' to 'D' after the range change has been performed.
High range should be used for all normal road driving and also for off-road driving across dry, level terrain. Low range
should only be required where low speed manoeuvring is necessary, such as reversing a trailer, negotiating steep
slippery surfaces or boulder strewn terrain. Low range should also be used for extreme off-road conditions where
progress in high range cannot be maintained. Low range should never be used for normal road driving.
Neutral Selection
The transfer box can be moved into a neutral position for towing the vehicle. The vehicle must not be towed with the
transfer box in high or low range. The transmission must also be in the neutral position. If neutral cannot be selected
on the transmission, the vehicle must not be towed.
