An older version of a manual transmission . When you wanted to go from low gear to the highest gear, you had to go through all the gears in between. Likewise when you wanted to go from the highest gear to the lowest, you had to proceed through all the intermediate gears .
PROGRESSIVE TRANSMISSION
Meaning of PROGRESSIVE TRANSMISSION in English
English dictionary of automotive terms. Английский словарь автомобильных терминов. 2012