Saturday, 9 July 2016

Working of Four Wheel Drive


• From the engine, clutch and transmission assembly, a short propeller shaft transmits the 
  power to a transfer gear box shown in the center of the vehicle

• The transfer gear box divides the torque equally between the front and rear wheels

• From the transfer gear box one propeller shaft connects the rear axle and the other to 
  front axle
 
• The front axle gears and differential are of similar or the same construction as the rear axle

• Apart from power transmission, the front axle allows the front wheels to be turned for 
  steering
   
  Further there is a provision in the control of the transfer gear box so that front wheel drive 
  may be disengaged when not required


  This type of drive is used in military trucks, jeeps and special purpose vehicles


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