This begins several articles we’ll do about independent training services – training, that is, with no direct connection to and no dependence upon any carmaker, toolmaker, parts manufacturer or reference information provider.

A “constant-velocity” joint doesn’t turn at a constant velocity; it moves a roughly the speed the driveshaft does, as the motorist decides.

With electronic blackboxes, we’re now used to the idea that a machine can be too small to see but still big enough to work.