Why Does My 2010 Volvo S40 Shake When Accelerating but Not When Coasting

QuestionsCategory: Ask An ExpertWhy Does My 2010 Volvo S40 Shake When Accelerating but Not When Coasting
James Gabriel Garcia asked 5 months ago
Hi, I'm experiencing a concerning issue with my 2010 Volvo S40 2.4L. Recently, while driving to work, my car began to shake violently, particularly during acceleration. This shaking is quite intense, akin to the feeling of nearly losing a tire. However, I've checked, and my tires are securely fitted, with the lugs correctly tightened. I should mention that I recently replaced my rear tires due to uneven wear (cupping), which might be relevant. Strangely, the car seems fine when parked and revved, and also when coasting, with the shaking only occurring during acceleration. I'm finding it hard to accurately describe the problem without you experiencing it firsthand, but I'm hoping your expertise can help diagnose the issue. Thanks in advance for your assistance!
1 Answers
Zack Norman Staff answered 5 months ago
Hi there, James! Car shaking can be a distressing experience, especially when it's as severe as you've described, so I totally get where you're coming from. Based on your account, here are a few potential causes and suggestions:
  1. CV Axles: Given the specific conditions you've mentioned (shaking on acceleration, fine when coasting), one common culprit could be the CV (Constant Velocity) axles, particularly if there's damage or wear.
  2. Engine and Transmission Mounts: While you've noted the car is fine when stationary, it's still worth checking the engine and transmission mounts. Worn-out mounts can cause shaking during specific driving conditions.
  3. Wheel Balancing: Even though you've recently changed the tires, it's possible they might not be properly balanced, leading to vibrations at certain speeds.
  4. Suspension Components: Issues with suspension components, such as struts or shocks, might also lead to shaking. Given the history of uneven tire wear, this could be a significant factor.
  5. Frame Damage: As you've mentioned uneven wear on the rear tires and considering the intensity of the shaking, it's advisable to check for any underlying frame damage, which could be exacerbating the issue.
We highly recommend getting a professional mechanic to conduct a thorough inspection. Sometimes, the problem might be a combination of factors, and a hands-on examination is the best way to pinpoint the exact cause. Zack - Motor Verso Mechanics Team