You have to adjust them a few times, I ended up using threaded rod for the rears and adjusted them about 6 times to get the height perfect (anytime I add 150+lbs the shocks fill to compensate). I think the instructions for the kit tells you to swap the rear links to the front, rear is more difficult because it tells the truck where to kick on the compressor and since every coil spring is different as well as the vehicle they're going on (added weight from stereo, rear seats, etc) there isn't a defined length that the sensors should be set to. Unfortunately there are too many variables so there will be a bit of trial and error involved. Mine sat way fvckin high right after the drop, pain in the ass to adjust the sensors but I'd just sack up and build some rear sensor links for it right off the bat. I can check the diameter of the links with a caliper if you like, I forgot the size but I just ordered a length of threaded rod from napa and cut some new ones slightly shorter than the links they send with the belltech kit. Installed the new links and adjusted them once or twice before the truck sat perfect. I also used a 38x1550x20 toyo mounted on a 20x12 we had at my shop to simulate the weight, certainly made the process faster and easier so I could jack the truck up quick and adjust the sensors again with the truck under *load*. I have never adjusted the front sensors, just swapped the rears to the front when I did the kit the rear is where you'll have issues.