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: Mercedes-Benz 7-gear dual clutch transmission 7G-DCT variable-speed transmission model case II Porsche Weissach axle (928) students assembly set, main shafts