Vibration that specifically builds or appears under acceleration, but is much less noticeable while coasting at a steady speed, usually points to something in the drivetrain that's under load only when you're accelerating — most often a driveshaft, CV joint, or an engine mount reacting to torque.
Constant velocity (CV) joints transmit power from the transmission to the wheels while allowing for suspension movement and steering angle. A worn CV joint can produce a vibration that intensifies under acceleration and is often accompanied by a clicking sound, especially when turning.
Where a worn engine mount at idle produces a steady shake (see our idle shaking guide), the same worn mount under the torque of acceleration can produce a more pronounced, sometimes clunking vibration as the engine briefly shifts against its mounts.
An unbalanced wheel's vibration typically scales with road speed, but because accelerating naturally increases speed, it can feel like the vibration is linked to acceleration itself rather than simply road speed climbing. See our high-speed vibration guide for more on this specific cause.
Similar to an engine mount, the transmission mount stabilises the gearbox. Wear here can produce a vibration or clunk specifically as torque is applied during acceleration, particularly noticeable in lower gears where torque multiplication is greatest.
A loose or damaged exhaust heat shield, or an exhaust component that's come into contact with the underbody due to a failed mounting rubber, can rattle or vibrate specifically as engine vibration increases under acceleration.
On rear or four-wheel drive vehicles, worn bearings or gears within the differential can produce a vibration that's most noticeable specifically under the torque of acceleration, often alongside a whining or humming noise that changes with engine load rather than purely with road speed.
This pattern often points to a worn CV joint or driveshaft, an engine or transmission mount reacting to torque, or an unbalanced wheel whose vibration is scaling with the increasing road speed.
A clicking sound that gets faster as speed increases, especially noticeable while turning, is a classic sign of a worn CV joint and is worth having inspected before it fails completely.
It's possible, particularly if the vibration also appears at a steady cruising speed and simply gets stronger the faster you go, rather than being tied specifically to the act of accelerating.
MotorLoom analyses the symptoms you describe and points you toward the most likely cause in under a minute.
Get My Free Fault ScanLast reviewed 2026-09-08 by the MotorLoom editorial team.