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Old 01-28-2015, 10:33 PM
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Diesel911 Diesel911 is online now
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You can replace the Bushing on the Upper Control Arm but not the Ball Joint. If the Ball Joint is bad you change out the whole Arm.

However, the real question is if the Mechanic is telling the truth. Meaning is he just saying that because the Rubber Boots are shot or because there is visable movement or you are having other symptoms.


If the Ball Joint on the Upper Control Arm is no good you once the Ball Joint is removed from the Steering Knuckle you will be able to willgle it around easily.

If the upper Control Arm Bushing goes bad "Sagging upper control arm bushings will cause the camber to become negative, resulting in inner edge tire wear."


Below is a pic of the Ball Joint end of the Upper Control Arm and you can see houw it is built into the Arm.
Attached Thumbnails
W123 Upper Ball Joint Bad-ball-joint-cross-section-upper.jpg  
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Last edited by Diesel911; 01-28-2015 at 10:43 PM.
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