One (also labelled "L"): Restricts the transmission to 1st gear only, often called a "low gear". This is useful when a sizable torque is necessary at the wheels (one example is, when accelerating up a steep incline); however use at better speeds can operate the engine at an excessive velocity, https://gearboxauto53073.bcbloggers.com/33303634/a-review-of-gearbox-auto