Borg Warner Transfer Box: Description & Operation (Page 12)
TRANSFER BOX
DESCRIPTION AND OPERATION
5
Introduction
The Borg Warner transfer box splits the drive from
the main gearbox to the front and rear axles through
the propeller shafts. Two speed ratios and a neutral
position are provided by means of a single, epicyclic
gear set. The two speed ratios, High and Low range,
and neutral position are selected electronically by
the ratio control motor.
A Morse chain transmits the drive through a gear
from the intermediate shaft to the differential unit.
The differential unit allows the front and rear output
shafts to rotate at different speeds. A viscous
coupling unit (VCU) limits the amount of slippage
allowed between the front and rear output shafts and
renders a conventional differential lock unnecessary.
