One (also labelled "L"): Restricts the transmission to 1st equipment only, also called a "reduced gear". This is beneficial when a considerable torque is required for the wheels (such as, when accelerating up a steep incline); however use at larger speeds can run the engine at an too much velocity, https://gearboxauto41738.snack-blog.com/34114115/the-basic-principles-of-gearbox-auto