Abstract: A gearbox having at least two gears is disclosed. The gearbox includes a shift selector, a first gearshaft, a second gearshaft selectively engagable with the first gearshaft via the at least two gears, and a first clutch mechanism located on the second gearshaft. The first clutch mechanism is configured to selectively engage the second gearshaft with the first gearshaft. The first clutch mechanism includes a clutch plate attached to first gear on the second gearshaft, and a pressure plate attached to the second gearshaft. The clutch plate and pressure plate are configured to selectively engage one another so that the second gearshaft engages the first gearshaft.