Transfer Case

Need of Four Wheel Drive:

The following situations need four wheel drive

 • Off road 
 • Climbing slippery hills
 • In snow

 In general military vehicles and sports utility vehicles (SUV)are provided with four wheeldrive

Transfer Case:

• This is the device that splits the power between the front and rear axles on a 

  four-wheel-drive car

• The transfer case on a part-time four-wheel-drive system locks the front-axle driveshaft to 

  the rear-axle driveshaft 

• So the wheels are forced to spin at the same speed

• Some transfer cases, also contain an additional set of gears that give the vehicle a low 

  range

• This extra gear ratio gives the vehicle extra torque and a   super-slow output speed.  

• In first gear in low range,  but incredible torque is produced at the wheels.

• This allows drivers to slowly and smoothly creep up very  steep hills