I hate the automatic hubs. They have failed for the third time in a year. The first time I took it in, the mechanic said a diaphram failed and the vacuum couldn't push the hubs in. He replaced the diaphram and it did the same thing 6 months later. This time Ford paid for the part. Three months later, it has failed again. I replaced my automatic hubs on my 1993 Explorer, but I don't think Warn makes a kit for the 1999 F150. Anybody have an idea?