A front-wheel drive vehicle makes a loud clunk on initial acceleration. Which could be the cause?

A front-wheel drive vehicle makes a loud clunk on initial acceleration. Which could be the cause?

• A. Worn inner CV joint
• B. Worn rack mount bushings
• C. Worn control arm bushings
• D. Loose cradle mounting bolts

Answer: (A)

A loud clunk on initial acceleration in a front-wheel drive vehicle is often indicative of a problem with the constant velocity (CV) joints. The inner CV joint is responsible for transferring power from the transmission to the wheels while allowing for the up-and-down movement of the suspension. When this joint is worn, it can become loose and create excessive play, leading to a clunking noise as torque is applied during acceleration. Worn inner CV joints typically result in noise that becomes more pronounced under load, such as when starting to accelerate from a stop. The sound may vary depending on whether the vehicle is turning or going straight, but a loud clunk at initial acceleration is a classic symptom of inner CV joint failure. The other options refer to other components of the suspension and steering system, which can result in various symptoms but are less likely to cause a loud clunk specifically during acceleration. Worn rack mount bushings and worn control arm bushings can lead to handling and steering issues, while loose cradle mounting bolts may cause a clunk when going over bumps or during cornering rather than specifically on acceleration.

A loud clunk on initial acceleration in a front-wheel drive vehicle is often indicative of a problem with the constant velocity (CV) joints. The inner CV joint is responsible for transferring power from the transmission to the wheels while allowing for the up-and-down movement of the suspension. When this joint is worn, it can become loose and create excessive play, leading to a clunking noise as torque is applied during acceleration.

Worn inner CV joints typically result in noise that becomes more pronounced under load, such as when starting to accelerate from a stop. The sound may vary depending on whether the vehicle is turning or going straight, but a loud clunk at initial acceleration is a classic symptom of inner CV joint failure.

The other options refer to other components of the suspension and steering system, which can result in various symptoms but are less likely to cause a loud clunk specifically during acceleration. Worn rack mount bushings and worn control arm bushings can lead to handling and steering issues, while loose cradle mounting bolts may cause a clunk when going over bumps or during cornering rather than specifically on acceleration.