List of "Things-Gone-Wrong"

^ "Balanced" shafts on modified vehicles are found to have over 4 times the maximum imbalance allowed by the guideline.

^ "Muffler pipe" used to make driveshafts (poor quality pipe - non-uniform metal thickness, oval/not round, rusts easily)

^ Too many balance weights used to balance a shaft

^ Driveshafts, made longer, are not increased in size when required.

^ U-joints not often up-sized, or up-graded, when required

^ Rear axle pinion angles too large on substituted or modified rear suspensions

^ Excessive U-joint angles on modified wheelbase/frame-stretched vehicles

^ U-joints not in line (in phase) at either end of a modified driveshaft. The yoke ends are crooked when welded onto the tube.

^ Alignment arrows on slip yokes and tube shafts not aligned. Sometimes the slip yoke is found turned by one spline tooth when installed, resulting in the driveline being several degrees out-of-phase.

^ Improper electrical grounding of eddy-current type brake retarders