I don't ever change direction of rotation, and a lot of tires are directional, look for the arrow. My lady friends 05 Explorer has 2 sets of tires/ rims, one summer, one winter, the better tread always goes on the rear when it's tire changing season. There's a crossmember associated with the frame beneath the front seats, I jack about 6 inches aft of that, on the frame, the front wheels come about 4" off the ground when the rear clears, and in the fall, I spray fresh undercoating on the welds on the frame, $4 a can at Walmart - takes one can a year, and with 150K on it, it has proven itself effective. I don't know if one of those $29.95 jacks will pick up high enough, and they arent real stable in the side to side axis. When you can afford it, pick up one of those 3 ton or better jacks at an estate sale, it's a 1 time purchase, if you let it down whenever you're done with it!