Hello kanonhian, welcome to the tractor forum.
Is your problem due to a lack of traction? Transmission gearing problem? For better traction you can add fluid in the rear tires, and wheel weights. You can also add a second rear wheel/tire (dual rear wheels/tires).
Is your problem due to a lack of traction? Transmission gearing problem? For better traction you can add fluid in the rear tires, and wheel weights. You can also add a second rear wheel/tire (dual rear wheels/tires).