Examkin

Question

Difficulty: MediumDriveshafts and Differentials

In a front-engine, rear-wheel-drive vehicle, mechanical torque travels through several drivetrain and rear axle components to propel the vehicle. What is the correct order of rotational power transmission, starting from where torque exits the transmission and ending at the drive wheels?

  1. 1Transmission slip yoke and front universal joint
  2. 2Driveshaft tubular body
  3. 3Differential drive pinion gear
  4. 4Differential ring gear and carrier assembly
  5. 5Drive axle shafts and wheel hubs

Answer

Transmission slip yoke and front universal joint → Driveshaft tubular body → Differential drive pinion gear → Differential ring gear and carrier assembly → Drive axle shafts and wheel hubs
In a rear-wheel-drive layout, engine torque exits the transmission via the output shaft into the slip yoke and front universal joint. Rotational power then travels along the driveshaft tubular body to the rear universal joint, which turns the differential drive pinion gear. The drive pinion rotates the larger differential ring gear and carrier assembly, which subsequently turns the differential side gears, drive axle shafts, and outer wheel hubs.

Step-by-Step Solution

1
Identify the component that receives torque directly from the transmission.
The transmission slip yoke splines onto the output shaft and connects to the front universal joint.
Rotational power must exit the transmission housing before it can be transferred along the chassis.
2
Trace the transfer of torque along the length of the vehicle.
Torque travels along the hollow tubular body of the driveshaft.
The driveshaft spans the distance between the transmission and the rear differential.
3
Identify how torque enters the rear axle housing.
Power passes through the rear universal joint into the differential drive pinion gear.
The drive pinion gear serves as the primary input gear for the rear differential assembly.
4
Follow torque transfer through the differential gear reduction.
The pinion turns the ring gear and rotates the differential carrier case.
The hypoid ring and pinion gearset redirects rotational force 90 degrees toward the wheels.
5
Determine the final component delivering torque to the tires.
Internal differential gears turn the axle shafts to spin the wheel hubs.
Axle shafts carry the driving force outward from the differential carrier to the wheels.

Key Concept

Rear-wheel-drive powertrain rotational power transmission sequence
Estimated Time:1m 0s
Rate this question

Topics

Driveshafts and Differentials

More questions from this topic