I have a 98 12v and I replaced my steering box because it was the wrong ratio. If your steering wheel will turn 4&1/4 turns stop to stop you have the WRONG box. A 3 turn is what you need to not wander all over the road. Check the new box before you install it by turning the input shaft stop to stop. I found it easier to remove the left front wheel and fender well liner and work through the exposed access holes. I sat on a stool under the fender and was not too uncomfortable. When you replace the fender liner you may want to go to Ace hardware and get some hex head sheet metal screws, the plastic fasteners break during removal. You will see how much easier it is to R&R the fuel filter from under the fender. $50 at the dealer for a new filter and $15 elsewhere. CAUTION, use suitable Jack Stands, a hydraulic jack can not be trusted, a seal can rupture at any time. When you disconnect the hydraulic lines wrap the ends with a clean rag to guard against contamination. 17 MM wrench. Be sure to place your steering wheel dead center and measure from a mark on the tie rod to a frame rail and go buy this measurement when you put the shaft back on and your steering wheel will be centered. If the right front wheel remains on the ground that should help keep the pitman arm/tie rod in proper position. Just before you connect the shaft check to make sure the steering wheel is still centered. Before you install the new box center the input shaft and mark it incase it moves you will know. When you remove the 3 bolts holding the box to the frame make sure it does not fall on you. It weighs 31 pounds. Get a friend to help if possible. I like having somebody to hand me this and hand me that. There are rubber "O" rings on the ends of the hydraulic lines. I replaced them even though they looked good. Once everything is back together fill the resevoir with PS Fluid (synthetic is best) and place your Jack so as to take most of the weight off the front tires. Allow your engine to idle and turn your steering wheel stop to stop several times and keep checking the fluid level because as the air goes out the fluid level will go down. After you test drive check the fluid level again. The results of the test drive will make your labor well worth while. You truck will now drive/steer like a car. If you have any questions or I forgot something E-mail -- email address removed -- or phone 321 373 5756 anytime. Enjoy, I was 77 when I did mine so I know anybody could do it. Don't rush and follow common sense SAFETY rules.