Clutch or gearbox problem

Common symptoms

Clutch slipping

The engine revs rise but the car doesn’t speed up as it should, especially in higher gears or going uphill. You may notice a burning smell. This usually means the clutch is worn.

Heavy, spongy or sticking clutch pedal

A pedal that feels different, sinks to the floor or doesn’t come back up can point to a hydraulic problem (master or slave cylinder) or a cable fault on older cars.

Difficulty getting into gear

Grinding or crunching when changing gear, or gears that won’t engage, can mean the clutch isn’t disengaging fully, or wear in the gearbox itself.

Juddering when pulling away

Often a worn or contaminated clutch, or worn engine and gearbox mountings.

Noises

A whine or rumble that changes when you press the clutch can come from the release bearing. Noise that changes with road speed in a particular gear points more towards the gearbox.

Automatic gearboxes

Harsh or delayed changes, slipping, a warning light or the car going into limp mode (a fixed gear and reduced power) all need checking. Don’t keep driving on a slipping automatic.

Is it safe to keep driving?

A slipping clutch will usually get worse, and can leave you stranded if it stops transmitting power. If the car won’t go into gear, or the clutch pedal stays on the floor, don’t try to drive it: arrange recovery to a garage.

Things you can check

• If your car has a hydraulic clutch, check the brake and clutch fluid reservoir level (many cars share one). A low level can mean a leak.
• Note when the problem happens: cold or hot, which gears, uphill or on the flat. It helps the mechanic find the fault faster.
• Check for warning lights and messages on automatic cars.

What a garage will do

A mechanic will road test the car, check the clutch hydraulics and adjustment, and inspect for leaks and worn mountings. Replacing a clutch usually means removing the gearbox, so it’s normally a workshop job rather than a roadside one. Many garages replace the clutch, release bearing and sometimes the flywheel together. Ask what’s included, and get a quote before the work starts.

Frequently asked questions

How long does a clutch last?

It depends heavily on driving style and use. Lots of town driving, hill starts and towing wear a clutch faster.

Can a mobile mechanic fix a clutch?

Sometimes for hydraulic faults, but a clutch replacement usually needs a workshop with a lift.

What does a burning smell when driving mean?

Often a slipping clutch, especially after a hill start or towing. Get it checked if it happens regularly.