The lowest gear in a transmission . Some older transmissions listed their gears as bull low (used for getting out of a stuck condition or climbing a very steep hill), low or first (used for starting out from a stop or for climbing a moderate hill), second (used for town driving or slight hills), third (used for highway cruising).
BULL LOW
Meaning of BULL LOW in English
English dictionary of automotive terms. Английский словарь автомобильных терминов. 2012