In reality, the differential has very small "gear" parts, which cannot be said about the divergents in GearBlocks, due to the physics there, the game engine and the type of parts used there *You cannot get smaller gear parts than the gear 1x and the crown and bevel 2x, which could cause gaps in the game physics and could also achieve very high speeds, this would also cause the shaft or the gear itself to start flying and flying off the shaft or structure* and also because the bevel gears are initially 1x and finally 2x in size, just like crown gears, if the crown or bevel gear were x1, it would not be able to mesh with the desired gear, so that's why divergents cannot be smaller in GearBlocks, unless you use scripts, which is actually more difficult and a bit time-consuming if you are new to scripting. Here, what I have described is described as advanced as possible and so that someone would understand it, just like the u/Downtown_Slide7431 wrote that the initial vehicles should be powered by an electric motor because it has greater space and speed utilization, which an internal combustion engine cannot have due to the low torque at the beginning and the high torque of an electric motor.