I installed newer ball joints in my 2002 Ford Explorer Sport Trac RWD. After 7 months, the one-piece trunk broke on the front right. Another had a poorly tapped hole for a mirror fitting to add lubrication. The grease nipple snapped at the very beginning and is no longer screwed in. I had to add sealant around the threads. I removed both lower arms to replace the bushings and found that these revised ball joints already had a lot of unacceptable play. DO NOT ORDER THESE BALL JOINTS FROM "AXIS DIRECT PARTS" ON AMAZON! They sent me Chinese nameless fake ball joints with a Moog part number. They didn't respond to my messages either.