26. Rear Hub Cracks on pre-1988 XJ6 and the XJS Jaguars
The pre-1988 XJ6 and the XJS have a problem with the outer hubs on the IRS unit. The lower pivot point has a tendancy to crack (definition: The rear hub is the big aluminum unit that the rear wheel bolts up to). Check these periodically, cleaning them up if necessary in order to see clearly. A cracked rear hub can fail at speed, which would be a bad thing.
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