Bull gear vs. Planetary final drives
WEBAug 19, 2020 · This means that a tractor with a planetary final drive can use small ratios in the transmission and get most of the total ratio in the finals, while a tractor with bull gears needs to get much more of the ratio from the gears in the transmission. The more rotating weight (inertia) you have ahead of a gear ratio, the harder it will be to change ...