Float shifting

Float shifting, or floating gears, is the process of changing gears, in typically a non-synchronous transmission, without depressing the clutch. Shifting in this manner is also used with synchronous manual transmissions, particularly after a clutch failure, to prevent destroying the synchromeshes with the power of the engine.

Drivers can shift non-synchronous transmissions without using the clutch by bringing the engine to precisely the right speed in neutral before attempting to complete a shift. If done improperly, it can damage or destroy a transmission. Some truck drivers use this technique with the higher gears. The technique is sometimes also used on motorcycles, but has largely been replaced by quickshifters for competitive use.

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