Differential Operation

FINAL DRIVE

51-10

DESCRIPTION AND OPERATION

Operation

Differential Operation
The operating principles of the front and rear differentials are the same. Rotational input from the propeller shaft is 
passed via the input flange to the pinion shaft and pinion gear. The angles of the pinion gear to the crown wheel drive 
gear moves the rotational direction through 90

°

.

The transferred rotational motion is now passed to the crown wheel drive gear, which in turn rotates the carrier. The 
shaft, which is secured to the carrier also rotates at the same speed as the carrier. The planet gears, which are 
mounted on the shaft, also rotate with the carrier. In turn, the planet gears transfer their rotational motion to the left 
and right hand sun wheels, rotating the drive shafts.

When the vehicle is moving in a forward direction, the torque applied through the differential to each sun wheel is 
equal. In this condition both drive shafts rotate at the same speed. The planet gears do not rotate and effectively lock 
the sun wheels to the carrier.

If the vehicle is turning, the outer wheel will be forced to rotate faster than the inner wheel by having a greater distance 
to travel. The differential senses the torque difference between the sun wheels. The planet gears rotate on their axes 
to allow the outer wheel to rotate faster than the inner one.