Sequential manual transmission A sequential manual transmission
(or sequential manual gearbox) is a type of manual transmission
used on motorcycles and high-performance cars for auto racing,
where gears are selected in order, and direct access to specific
gears is not possible. With traditional manual transmissions,
the driver can move from gear to gear, by moving the shifter to
the appropriate position. This type of transmission is often
referred to as a H-pattern because of the path that the shift
lever takes as it selects the various gears. A clutch must be
disengaged before the new gear is selected, to disengage the
running engine from the transmission, thus stopping all torque
transfer. In auto racing, this process is slow and prone to
human error; hence the development of the sequential
transmission. A true sequential transmission will very often use
dog clutch engagement rather than the more usual synchromesh as
fitted to a normal H-pattern road car gearbox. Engagement using
dogs only requires a very b