here's the issue with the squeaking i have it also and it drives me nuts, what is making noise is one of two things, either the pads between the leaves or the end bushings in the rear. the pads between the leaves dry out so you can get them to re-moisten with WD40 or a fine oil, which will solve the problem for a few weeks, however most likely the issue is the rear bushing, the problem with the bushing is it's terrible design, it's a two shell system, with an other shell that is pressed into the leaf spring containing within itself a smaller bolts guide which sandwiches a rubberized material. when the rubber dries out and wears it makes noise, eventually a metalic sound when going over bumps. To solve the problem you need to change the bushings, but there's a problem with that too, Ford sells a bushing seperatly, and getting the old one out isn't a problem if you have an air hammer but getting the new one in requires somekind of speciallized pushing tool or the removal of the whole leaf pack and pressing the bushing in with a 5 ton bench press. so the solution which i am going to follow is either to go to a sping shop and see what options they offer as far are replacing bushings with the leafs still on or replacing the whole leaf spring with a univerisal spring that jcwhitney sells for like 99 bucks each, and that is the whole issue
