Ok so in SP the wheels do not connect via any drive shafts or gears or any tangible thing to the engine, they just connect, the problem with this is that you can't have torque over speed or speed over torque, it's annoying for building rock crawlers, but if SR could at the least have this, a secpndary output that can be connected to any amount of engine's and could be set to out put either extreme torque to the wleels or extreme speed to the wheels this would be awesome and help with building rovers for specific stuff!