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Repair Manual
MAN-00
190
THAR
CRDe
BS-IV
MAY
2012
/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The methods may be modified as a result of changes introduced by the
manufacturer in the production of the various component units and accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present
document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the trained personnel, at the Authorized Service Centre of Mahindra
& Mahindra Ltd., will amount to unauthorized use and shall be liable for penalty/prosecution© 2012 Mahindra & Mahindra Ltd.
Description
Electronic Transfer Case‐Overview
A.
Electronic Transfer Case
Description and Operation
The Divgi‐Warner’s two‐speed, part‐time electronic shift transfer case consists of a shift motor, speed
sensor, electric clutch and transfer case Electronic Control Unit (ECU). The mode selector switch
located on the centre console, which is used to select the transfer case mode and mode indicator
(4WH and 4WL) are on the dash board. The wiring harness connects the above parts with the power
input.
The power received by the input shaft and is coupled to the two output shafts of the transfer case.
One of the output shafts is fixed to the rear axle and other is fixed to the front axle.
The planetary gear set provides gear reduction. The power is transferred to the front wheel drive
through a Morse HY‐VO chain drive. The oil pump provides lubrication to the planetary gear set and
the upper output shaft components. The 2H, 4H and 4L modes are obtained by rotating the selector
switch, which in turn gives a signal to the transfer case ECU that controls the operations. The transfer
case ECU senses the conditions and shifts the transfer case as per the selected mode.
The transfer case allows both two and four wheel drive operations. The HY‐VO chain‐driven output in
the transfer case provides four wheel drive for the vehicle. The positive displacement oil pump and
filter in the transfer case assures full lubrication while driving or towing the vehicle, reducing
maintenance needs. The helical gearing provides quiet and low‐range operation. The four‐wheel drive
indicator light on dash board indicates the four wheel drive. The electromagnetic shift
‐on‐the‐fly
provides effortless engagement of four wheel drive high mode at highway speeds. However the four
wheel drive low engagement, vehicle should be at zero speed and should be in neutral.
The auto‐locking hub should be lubricated as per the maintenance schedule.
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