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Double de-clutching, a requirement
of drivers of old vehicles

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What double de-clutching is

Double de-clutch­ing is a method of gear changing using a gearbox which is not fitted with the synch­romesh devices which are assumed to be just 'normal' today.

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Why double declutch?

If a driver didn't double de-clutch or didn't do it properly, there was a gear 'clash'. As well as being horribly noisy, this could be horribly expensive.

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How to double de-clutch

In simplified terms, in preparation for changing gear, place your left hand on the gear selector lever and your left foot in place upon the clutch pedal. Then, concurrently, release pressure on the throttle pedal and apply pressure to full depth onto the clutch pedal. This is the first de-clutch which disconnects the engine from the drive wheels at the back.

In this condition, with the clutch pedal fully depressed, move the gear selector lever into 'neutral' and release the clutch pedal. The engine, although still not connected to the rear wheels, is now re-connected to the input, output and lay shafts within the gearbox. In this condition bring the engine up to the estimated speed it would need to be running once the next gear is actually engaged. Next, a moment later, press the clutch pedal full depth - which is the second de-clutch - and move the gear selector lever to its next position. Finally gently release the clutch pedal to complete the gear change.

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My experience of double de-clutching

The above method was what I was taught when first learning to drive. Soon it became second nature for a gear change to take less than a second - except that I was not doing it many hundreds of times while, at the same time, distracted by the responsibilities of driving a London bus!

If you can add anything to this page or provide a photo, I would be pleased to hear from you.

Pat Cryer, webmaster

Page contributed by Jan Clifford

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This website Join me in the 1900s is a contribution to the social history of everyday life in 20th century Britain from the early 1900s to about 1960, seen through personal recollections and illustrations, with the emphasis on what it was like to live in those times.