Range Rover P38
TRANSFER BOX
7
DESCRIPTION AND OPERATION
Selector mechanism
The selector mechanism comprises a selector fork
and an interlock spool. The selector fork is mounted
on a shaft between the front and rear casings. The
interlock spool is mounted on a spindle through the
rear casing and is positively connected to the ratio
control motor. The selector fork is engaged in a cam
track on the spool. When the ratio control motor
rotates the spool, the rotational movement of the
spool is converted to linear movement of the selector
along the shaft.
The selector is engaged with the reduction hub. The
linear movement of the selector moves the reduction
hub in the epicyclic gear set changing the ratio
between high, low or neutral.
Lubrication
Lubrication is provided by a low geroter plunger type
oil pump which is driven from the epicyclic gear set.
The oil pump passes oil through oil ways in the
components to lubricate the epicyclic gear set. The
differential unit and morse chain are partially
immersed in oil and are lubricated as the components
rotate.