Dual Mass Flywheel Replacement. Done Once. Done Properly.

A dual mass flywheel (DMF) is a two-piece flywheel with internal springs and dampers, designed to absorb engine vibration before it reaches the gearbox. Almost every modern diesel and many performance petrol vehicles use one because diesel engines produce strong torsional pulses that would otherwise damage the gearbox. The trade-off is that DMFs wear out — typically between 80,000 and 150,000 miles — and need replacing.

The most common symptoms are juddering or shudder when pulling away in first gear, a metallic rattle from the gearbox at idle that quietens when the clutch is pressed, a knocking or clattering sound when starting or switching off the engine, excessive vibration through the clutch pedal or gear lever, and clutch slipping or premature clutch failure caused by a worn DMF damaging the friction plate.

DMFs fail because the internal springs, dampers, and bearings simply wear out from millions of cycles of absorbing engine vibration. Aggressive driving, towing, slipping the clutch, lugging the engine in too high a gear, and remap/tuning that increases torque all accelerate DMF wear. Once the internals fail, the two halves of the flywheel can rock relative to each other — that's what causes the juddering, rattling, and eventual clutch destruction.

We don't recommend single-mass (solid) flywheel conversion for most road cars. While they're cheaper and won't wear out, they transmit all engine vibration straight into the gearbox — leading to noisy gear rattle at idle, harsher gear engagement, and significantly reduced gearbox life. Single-mass conversions are best left to track cars and heavily modified builds. For everyday road use, a genuine OEM-grade DMF is the right call.

We strongly recommend replacing the clutch kit at the same time. The labour to access the DMF is identical to the labour for a clutch replacement, so doing both together saves you the cost of a second job later. Fitting a new DMF behind a worn clutch will quickly damage the new flywheel, and fitting a new clutch onto a worn DMF will destroy the new clutch. They wear together, they should be replaced together.

Most mobile DMF and clutch combo replacements take between 4 and 6 hours from arrival to road test, depending on the vehicle. Larger vans, 4x4s, and vehicles needing subframe removal can take up to 7 hours. We'll give you an honest timeframe specific to your make and model when we book — and you'll get a fixed all-inclusive written quote before we start.