Most Spridget front suspensions have excess play (they’ve had a hard life). Tightening things up pays immediate dividends, both in performance and sure-footedness. Spridgets (and lots of other cars of the era) ride on a solid king pin. The swivel axle that rides on the king pin has bronze bushings pressed in place, and those bushings are prone to wear, especially if they are not greased regularly, as the pair of videos in this post can attest.
King pin suspension systems have a lot of parts, many more than a ball joint system does. That means many more opportunities for wear, and for part failures. The threads on the fulcrum pin, constantly turning in the control arm as the car goes over bumps, hills, and around curves, wear out, creating slop in the control arm. The repeated vertical motion wears the thrust washer, creating up-and-down slop. Years of constant contact with the road and turning wears the upper and lower bushings, creating lateral slop. The lever shock, which also serves as the upper control arm on Bugeyes, wears internally, creating a harsh ride and affecting the suspension geometry.
[Read more…] about Suspect suspension: have you checked your king pins lately?