How many gears are there in the tractor gearbox?
Because of the commonly used or gear shift gear lever, and its gear number is also easy to control (the ideal number of manual transmission is less than 6 gears). So there's only one small lever to control the second transmission.
As for the arrangement of gears, it is easy to understand. The second transmissions are equivalent to the variable transmission ratio of the main reducer (which can be controlled by second small gears using similar off-road vehicles).
Tractors do have a number of stalls, but in most cases the two transmissions are relatively simple in series. For example, the first transmission, the 5 gear, the second transmission, and the 2 gear. The final ratio of the total transmission ratio is 5 x 2=10, with 10 stalls.