New and old axle shafts with new and used U-joints on cardboard

Two axle shafts with U-joint yokes laid on cardboard; the upper shaft is clean/new with fresh splines while the lower is worn and discolored. A new gold-capped U-joint, an old used U-joint, and two bearing caps sit alongside for comparison.

AI caption July 2006 · Photo 445 of 1128