Re: New FX4 owner here.............
Mine is a Ranger, 4.10 axle ratio, 31x10.5x15 tires, skid plates, alco wheels, Bilstein shocks, 4.0 SHOC, 5-speed, Torsen limited slip rear diff, 31-spline 8.8 rear axle.
If you have never been on the sand, you will need to do some research and assemble a sand kit before you go. Lower tire pressure 20-psi is good for sand. You will need to air up when you get back on pavement. Other stuff, tow hooks, 20,000 pound recovery strap, shovel, 12" x 12" plywood plate for jacking in sand. There are som other things, but any of the internet truck sites will have discussions sand driving and preparation.