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Closed Knucle Front Axle

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Closed-knuckle front axles used kingpin bearings instead of ball joints. The kingpins can wear out and cause death wobble and poor steering. Also, the spindle is affixed to the soft cast knuckle material with screw-in bolts. Removing the bolts and replacing them with graded button-head screws (see Jp magazine, “Disc Swap Plus,” May ‘11) makes for a much stronger attachment point and will prevent the spindle from ripping away from the knuckle with real off-road use.