How much do you know about drive axles and differentials?
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Questions and Answers

What is the purpose of a drive axle assembly?

  • To change the direction of engine torque and allow the drive wheels to rotate at different speeds (correct)
  • To provide power to the engine
  • To steer the vehicle
  • To control the suspension system
  • Which type of vehicles use a live axle to transfer power to the drive wheels?

  • Front-wheel-drive cars
  • Rear-wheel-drive vehicles (correct)
  • All-wheel-drive cars
  • Four-wheel-drive trucks
  • What is the gear ratio of the final drive called?

  • The axle ratio (correct)
  • The ring and pinion ratio
  • The differential ratio
  • The gear reduction ratio
  • What type of differential directs more power to the side gear attached to the wheel with better traction?

    <p>Limited-slip differential</p> Signup and view all the answers

    When does differential action occur in a vehicle?

    <p>When it corners</p> Signup and view all the answers

    What are the potential drawbacks of changing the rear end ratio?

    <p>Decreased fuel economy, incorrect speedometer and odometer readings, increased engine noise, and increased engine wear</p> Signup and view all the answers

    What type of differential uses tapered cones instead of clutch packs?

    <p>Cone-type preloading clutch differential</p> Signup and view all the answers

    What type of differential uses a silicone-based fluid to resist high-speed differences between shafts?

    <p>Viscous-coupled differential</p> Signup and view all the answers

    What is the purpose of lubricants with friction modifiers in differentials?

    <p>To prevent premature wear and vibration in clutch discs</p> Signup and view all the answers

    What are some brand names used by different manufacturers for their differentials?

    <p>Positive Traction, Sure-Grip, Anti-Spin, and Traction-Lok</p> Signup and view all the answers

    What is the purpose of adjustment shims in differentials?

    <p>To vary the amount of traction needed for locking</p> Signup and view all the answers

    What type of differential uses a torque sensing, locking design with worm side gears and worm wheel pinions?

    <p>Torsen differential</p> Signup and view all the answers

    Study Notes

    • Rear-wheel-drive vehicles use a live axle to transfer power to the drive wheels, while front-wheel-drive cars use a nonpowered rear axle or final drive assembly.
    • A drive axle assembly includes ring and pinion gears, a differential, and axle shafts.
    • The purpose of a drive axle assembly is to change the direction of engine torque and allow the drive wheels to rotate at different speeds.
    • The final gear reduction in the drive train occurs in the drive axle assembly, and the gear ratio of the final drive is called the axle ratio.
    • Final drive gear sets may be hunting, nonhunting, or partially nonhunting, depending on the final drive gear ratio.
    • Open differentials deliver equal torque to both wheels at all times, while limited-slip differentials direct more power to the side gear attached to the wheel with better traction.
    • When a vehicle travels straight, differential action does not occur, but when it corners, the outside wheel gains the same number of RPMs that the wheel on the inside loses.
    • Changing the rear end ratio can increase vehicle performance but may lead to decreased fuel economy, incorrect speedometer and odometer readings, increased engine noise, and increased engine wear.
    • The final drive gear ratio affects final drive gear set manufacture and service, and manufacturers lap the contacting gear teeth to decrease wear.
    • The position of the drive pinion gear on the ring gear changes during operation, and the gear lubrication must be specifically designed for hypoid gear sets.
    • Differentials distribute torque to both wheels in a vehicle.
    • Limited-slip differentials allow for equal or unequal torque distribution.
    • Preloaded clutches use springs and clutch packs to lock side gears to the case.
    • Adjustment shims can be used to vary the amount of traction needed for locking.
    • Cone-type preloading clutch differentials use tapered cones instead of clutch packs.
    • Viscous-coupled differentials use a silicone-based fluid to resist high-speed differences between shafts.
    • Eaton "locker" differentials use a unique mechanism to compress clutch packs.
    • Torsen differentials use a torque sensing, locking design with worm side gears and worm wheel pinions.
    • Lubricants with friction modifiers are important for clutch discs to prevent premature wear and vibration.
    • Different manufacturers use different brand names for their differentials such as Positive Traction, Sure-Grip, Anti-Spin, and Traction-Lok.

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    Description

    Think you know everything about drive axles and differentials? Test your knowledge with this quiz! From gear ratios to limited-slip differentials, this quiz covers it all. Challenge yourself to see how much you know about the components that transfer power from your engine to your wheels. Don't miss out on the chance to learn more about the inner workings of your vehicle. Take the quiz now!

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