Four-wheel drive capability provides vital traction in slippery, muddy, or hilly field environments. Test the engagement of the front axle under load to ensure smooth transfer of power without knocking noises. Verify that differential locks engage and disengage correctly, as functional four-wheel drive systems are essential for challenging soil conditions. https://2e53d9dfb43f-20251219140829.yourwebsitespace.com/blog/post/used-tractor-serial-number-not-present-identification-guide