1)40HP 4WD wheel farm tractor 2)SL3100 or JD490 diesel engine 3)8+ ... clutch tractor404:40HP, 4wd, EPA approval, SL3105 engine, front and rear ballast, power steering, dual-stage clutch, multi-way valve, 540 ... Type 540/1000Spline SizeF35 Rectangle Spline with 6 teeth 40HP wheel farm tractor