Clutch Failure: Symptoms and What to Do Now

How to recognise a failed clutch

• The clutch won't disengage: the clutch disc still touches the flywheel even with the pedal pressed. Gears only engage with force, or not at all.
• The clutch pedal stays down or doesn't return. Often the cause is a sticking slave cylinder or a broken return spring.
• The pedal feels soft or suddenly has a lot of free play.
• The clutch slips: engine revs rise, but the car doesn't accelerate accordingly.
• A burning smell, jerking when pulling away, or noises when pressing the pedal.

What to do immediately

1. Switch on hazard lights and, as long as you can, coast to a safe spot.
2. If you can no longer change gear but still roll: let it coast, stop the vehicle, don't force a gear.
3. Apply the handbrake, put on a hi-vis vest, and get behind the crash barrier if you're on a fast road. See Breaking down on the motorway.
4. Don't keep driving. Safe gear changes usually aren't possible any more, and you risk further damage to the transmission.

Why towing with a rope rarely works here

A vehicle with a failed clutch can sometimes be towed with a rope if it's out of gear. But if the pedal is stuck or a gear is engaged, the wheels can't turn freely. On a flatbed, the vehicle is easier to move, and the transmission and drivetrain stay unstressed. Rules for towing your own vehicle are in Tow rope or towing service?

Details about the fault

• Whether a gear is engaged and whether the vehicle can be pushed
• Whether the pedal stays down or feels soft
• Manual or automatic (automatic transmissions don't have a clutch in the traditional sense, see Towing an automatic car)
• Where the vehicle is and where it should go

After the transport

The garage checks whether the cause is the master or slave cylinder, the return spring, the clutch disc, or the cable. Ask for a cost estimate before the repair begins. Describe how the fault first appeared, since that helps the diagnosis.

Slipping, dragging, not disengaging: three different faults

A failed clutch doesn't always look the same. If it slips, revs rise without the car accelerating accordingly, often with a smell of burnt friction material. If it doesn't disengage cleanly, gears only engage with force or noise, and the car can lurch forward when a gear is engaged. If it drags, noises appear when pressing or releasing the pedal. A pedal that stays on the floor after being pressed, or gives way with no resistance, points more towards the hydraulics than the friction material.

Where the fault can come from

• Wear on the clutch disc after many kilometres, frequent stop-and-go driving, or towing a trailer.
• Hydraulics: the master or slave cylinder or a line can develop a leak; air in the system makes the pedal feel soft.
• Cable on older vehicles: it can stretch, snap, or be mis-adjusted.
• Release bearing or dual-mass flywheel, which announce themselves through noise when the clutch is used.

Pulling away without a clutch: not a good plan

You sometimes hear the tip of pulling away in gear without the clutch, or changing gear without pressing it. That's an emergency workaround for extreme situations, for example getting out of a dangerous spot. As a long-term solution it strains the starter motor and transmission and can cause further damage. It's not enough to get you to a garage. If you can no longer operate the clutch safely, have the vehicle transported.

Automatics and dual-clutch transmissions

On vehicles with a dual-clutch or automatic transmission, a fault looks different: the vehicle jerks when pulling away, misfires, or shifts gears erratically, often with a warning message. Even then, don't keep driving on your own judgement. How an automatic vehicle is transported is covered in our guide Towing an automatic car.

Stopping safely

Don't stay stopped with a failed clutch at a junction or in the carriageway; coast with your remaining speed to the side. Switch on hazard lights, apply the parking brake, and secure the vehicle, with a warning triangle if needed. On a slope, engage a gear or turn the wheels against the kerb so the vehicle doesn't roll away.