ball and socket joint Design of a ball and socket joint (constant-velocity or homokinetic joint) Function of the balls and the ball cage. The axle journal can be pivoted, but only be moved up and down minimally. description ordernumber 1262 see also: Haldex clutch of the fourth generation assembly of differential gear with crownwheel six-speed direct shift transmission (VW) four-speed automatic transmission for front-wheel drive (ZF)