I'm doing this search for a friend who isn't quite the hitek rednek that I am. He has a '99 F150 which is intermittently locking up the ABS when he brakes normally. The shops havn't found the problem yet. His truck has rear discs and a body lift, and the shop replaced his rotors/pads last week. Have there been any recalls on this issue? Is it possibly a problem with either the body lift or rear discs? Thanks for any input