For the lower ball joint, position the hole for the grease fitting facing the front of the Jeep and use the tool to carefully press it in place. Make sure the ball joint goes in square and even. This will take a lot of effort. Work slowly and don’t get too frustrated. Press the ball joint in until the collar seats on the bottom axlehousing. Once you have the ball joint completely in, you can thread in the grease fitting and reinstall the polyurethane boot and spring retainer on the bottom.