Testing and Inspection for Suspension Ball Joint - Component Information
Inspect the ball joint for relative movement by alternately pulling downward and pushing upward on the upper control arm by hand. Note any
relative vertical movement between the wheel knuckle and upper arm at the upper ball joint.
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If relative movement is not felt or seen, the ball joint is OK. Do not install a new ball joint.
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If relative movement is found, continue with Step 8.
8. NOTE: In order to obtain an accurate measurement, the dial indicator should be aligned as close as possible with the vertical axis of the ball joint.
To measure ball joint deflection, attach a suitable dial indicator with a flexible arm between the upper control arm and the wheel knuckle or ball
joint stud.
9. Measure the ball joint deflection while an assistant pushes up and then pulls down on the upper control arm, by hand.
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If the deflection exceeds the specification, a new ball joint must be installed.
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If the deflection meets or is below the specification, no further action is required.
