Double-Declutching
Double-declutching is a gear-change technique that matches gear speeds manually, needed on gearboxes without synchromesh.
What is Double-Declutching?
The clutch is pressed twice during one gear change. On downshifts, a blip of throttle in neutral raises gearbox speed. Old cars, some trucks and race gearboxes may need it. Some drivers still use the technique for smoother downshifts in older cars.
How it works
Briefly engaging the clutch in neutral lets the engine speed up or slow down the gearbox shafts to match the next gear.
Why it matters for your car
It takes practice; forcing gears damages the gearbox. Modern synchromesh gearboxes do not need it.
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