Like others have said, atc 300 works. Last year I put an atc 300 on a two-wheel drive Jd 7700. Installed it myself. Very happy with it. Took a little time to figure out placement of valves and hose routing but definitely would do it again. Works awesome. Little more money than an atu 300 but glad I did it. Just keep in mind when you price the kit, you will have about another $1000 in hoses that don't come in kit.