I have a 4300 jd with Cruise that did not work when delivered. I took it apart to learn that the system consists of a switch on the dash, a magnet and a bracket that holds the magnet in place below the foot pedal. When you turn the switch to the on position it electrifies the magnet and holds the foot pedal in place. It seems that you can buy the individual parts and install them on any tractor where the foot pedal side is accessible to the magnet. Take a look at the sysytem at your dealer and see how it is set up. Good luck