[1] It produces faster shift times than traditional synchronized manual transmissions, and restricts the driver to selecting either the next or previous gear, in a successive order.
Underbones, however, often use a semi-automatic transmission with an automatic centrifugal clutch, but will still retain the conventional foot-operated gearshift lever, such as the Honda Super Cub.
This was closely followed by WRC Rally cars in 1997, 1998, and 1999, and also the Porsche LMP1-98, Nissan R390 GT1, Toyota GT-One, and the BMW V12 LM' and LMR Le Mans Prototype racecars in 1998 and 1999.
Touring cars have also used sequential manual gearboxes; starting with the European DTM series in 2000, which used it for 12 seasons, until a switch to a paddle-shift system in 2012.
[14][15][16][17] Due to the high rate of wear and abrupt shifting action, sequential manual transmissions are rarely used in passenger cars, albeit with some exceptions.