Two front axle shafts with U-joints laid side by side on a workb…

Two front-axle shafts with universal joints laid side by side on a dark workbench for comparison. The upper joint has a bright bare-metal bearing cap while the lower one is uniformly weathered brown, and both shafts end in splined stub ends; a cotter pin lies at left.

AI caption October 2007 · Photo 4700 of 5000