Generally
The ball bolt that sits between the rear axle and the rear upper support arm, mounting kit included.
Fits all 1959 after chassis number 15748
Below is a picture of an original rear ball joint that has come apart, when this happens there is nothing to guide the rear axle sideways. Carefully check the condition of your ball joint, if in doubt replace the ball joint. The appearance of the ball joint may vary depending on which brand we get hold of, we deliver what we have in stock at the moment.