Introduction

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.