Land Rover Defender manuals

Land Rover Defender: Component Location, Overview

COMPONENT LOCATION

COMPONENT LOCATION - 1 OF 1

Transfer Case

  1. Twin speed transfer case

OVERVIEW

The twin speed transfer case is full time, permanent all wheel drive unit, with 50/50 torque distribution to the front and rear driveshafts. The transfer case is identical for all engine derivatives and supports the following features:

The twin speed transfer case is located under the vehicle and is installed on the cross member, behind the automatic transmission.

The input torque is equally distributed through a bevel gear center differential. The twin speed transfer case equipped with an electronically controlled locking and torque-biasing device. The twin speed transfer case can provide an optimal torque distribution to each wheel in all driving condition. Electronically controlled locking and torque-biasing device detects wheel slip through various vehicle system inputs to the Transfer Case Control Module (TCCM).

Electronically controlled locking and torque-biasing device locks the differential accordingly. The locking torque is applied through a multiplate clutch assembly.

A planetary gear set, located in the differential assembly, allows the driver to select high or low range. In low range, the planetary gear set provides a ratio of 2.93 : 1. Low range gives the vehicle an extremely low crawl speed for off road driving and trailer towing. High range is a direct drive from the transmission output shaft and provides a 1 : 1 ratio.

The oil used in the transfer case is specially developed and contains unique additives, which enhance the transfer case operation. No other oil must be used in the transfer case.

A unique type of grease, grease Weicon TL7391, must be applied to the transfer case input shaft spline when installing the transfer case.

Transfer Case

  1. Input shaft spline

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 Description

TRANSFER CASE EXPLODED VIEW Synchronization spring (quantity 3) Spring bracket Multiplate clutch ( 10 friction plates, 10 steel plates) Synchronization cup Drum clutch Plate clutch pack Synch

 Operation

High range operation In high range, the torque output from the automatic transmission is passed to the transfer case input shaft. The position of the shifting sleeve couples the input shaft directly

 Transfer Case - Diagnosis and Testing

DIAGNOSIS AND TESTING PRINCIPLE OF OPERATION For a detailed description of the transfer case system and operation, refer to the relevant Description and Operation section of the workshop manual. INSP

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 Introduction

First Warning Statement: Engine exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. In addition, certain fluids contained in vehicles and certain products of co

 Wheel Arch Protection

WHEEL ARCH PROTECTION - PART NUMBER: 90: VPLEP0381, VPLEP0382, 110: VPLEP0379, VPLEP0380 REMOVAL AND INSTALLATION WARNING: Accessories which are not correctly installed can be dangerous. Read the instructions carefully prior to installation. Comply with instructions at all times. If in doubt, conta

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