I installed the 5100's on my truck about a month ago and it was a pain in the ass, but well worth in ride quality when its done. Hopefully it should be the same for 4th gens. First of all you will need a good set of sping compressors. I got mine from Napa for $40. Just don't buy cheap ones from ebay or something. You don't want the compressors breaking and risk killing your self. there is a lot of stored energy in the springs once compressed. The Napa ones worked well for me. Once you have them compressed the biggest pain now lies with how to stop the shaft of the strut from spinning so you can take the nut off on the top. I used as many vice grips as i could find. Clamp them on to the shaft of the strut and let them wedge themselves against the spring compressors. this will hopefully help to stop the strut from turning, if not ill explain later. (also clamp another two vice grips at the bottom of the spring next to the spring compressors - one on each side. this will stop the spring compressor from potential moving.) (better safe than sorry) I wound up using a total of 6 vice grips (had to borrow some from my dad too.) then you can take the top nut off. You will deffinately need and air wrench for this as it will be very rusted on. one of mine was so rusted that the shaft kept turning and i could not get the nut off and i had to cut the top of the shaft and drill out the nut so i could get it off. I also bought new top spring seats for both sides. (they were only $25 each also at NAPA) and when you are tighten things back up just remember to check your torque specs carefully. I waited about 3-4 days before i got an alignment. you want to drive it for about 150 miles first and then recheck all of your torque settings, and then take it in for alignment after that. especially if you put other new parts on. I replaced my stabalizer links and one of my hubs at the same time.