How to replace your Drive shaft u joint on a 1970 Chevy Chevelle. Find all the details inside Car Craft Magazine.

The working angle of a U-joint should be no greater than 6 degrees, and the difference in angles between front and rear U-joints on the same driveshaft should not exceed 1 degree, Sanko says.

Is there a good mechanical engineering reason for this? -- Dave When car makers say you have to replace the entire driveshaft instead of just the worn universal joint, are they giving you the shaft?