How to test the upper ball joint on a Ford Explorer?
How to test the upper ball joint on a Ford Explorer? To test the upper ball joint, grab on both sides of the upper control arm. The lower ball joint should have less than .8mm of deflection and the upper control arm should have no more than .2mm of deflection. What should I do for alignment on my Ford Explorer? When making adjustments that require moving both the front and the rear of the upper arm, move both ends of the arm equally. Additional caster adjustments can be made by loosening the lower arm rearward nut and adjusting the rear...