Symptoms
- Shuddering or hopping felt through the car under hard acceleration
- Worse from a standing start than while already moving
- Sometimes accompanied by a clunk
Likely causes
- CommonWorn control arm or subframe bushingsSoft or torn bushings let the suspension shift under torque, causing a hop.
- PossibleWorn CV joints or axlePlay in the drivetrain can contribute to a shudder under hard acceleration.
- PossibleWorn motor or transmission mountA failing mount lets the engine or transmission shift under load, which can feel similar to wheel hop.
What to do
- Note whether the shudder happens only under hard acceleration from a stop, or also during normal driving.
- Have a mechanic inspect control arm and subframe bushings for wear on a lift.
- Check CV joints and axles for play or damage.
- Inspect engine and transmission mounts, since a bad mount can mimic this symptom.
- Replace whichever component is confirmed worn.
Tools and parts
Control arm bushingSearch: “control arm bushing for [your car model]”
Motor mountSearch: “motor mount for [your car model]”
When to call a pro
This symptom can come from several different systems (suspension, drivetrain, or engine mounts), so a shop inspection is the most reliable way to pinpoint it.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.