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Difficulty: EasyDriveshafts and Differentials

When a vehicle makes a turn, the outside drive wheel must travel along a longer path than the inside drive wheel. Which drivetrain component enables the drive wheels on the same axle to rotate at different speeds while delivering power?

  1. A
    Shock absorber
  2. DifferentialAnswer
  3. C
    Brake rotor
  4. D
    Universal joint

Answer

Differential
The differential assembly contains internal spider gears and side gears that permit the left and right drive wheels to rotate at different speeds when cornering, while steadily delivering engine torque from the driveshaft.

Step-by-Step Solution

1
Analyze the mechanical requirements of vehicle turning
During a turn, the outside wheel travels a wider arc and must rotate faster than the inside wheel.
If both wheels were locked to rotate at the same speed, the tires would scrub and hop during turns.
2
Identify the drivetrain component responsible for splitting axle torque while allowing speed variance
The differential assembly uses side gears and spider pinions to allow left and right axle shafts to turn at different rates while receiving continuous drive torque.
The core function of an automotive differential is to balance driving power while accommodating wheel speed differences in turns.

Key Concept

Differential Function and Cornering Operation
Estimated Time:45s
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Topics

Driveshafts and Differentials

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