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The mkiv Supra Owners Club

Rear upper control arm Ball Joint


T2 MSW

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The floppy ball joint is usually a sign of some ball wear but I've had stiff ball joints that vibrate like hell. The only way to guarantee if a ball joint has too much wear is the use a pry bar and see/hear if it knocks as you lift and drop to rise and lower the joint pressure. Even if there is no sign of wear, a ball joint can still be no good. I've never rescued a ball joint by packing in more grease through a nipple or by injecting through the rubber boot. 

As for ball joints, Dorman manufacture a lot of different size ball joints though these days they are probably Chinese or Mexican third party produced rather than USA manufactured products. RockAuto distribute a good amount of Dorman products. Andy Ven offers a reasonably priced replacement service though.

https://www.rockauto.com/en/parts/dorman,ball+joint,10070

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