A rack and pinion assembly, especially suited for automotive steering linkages, having at least one yoke member slidably supporting the rack bar on the side remote from the rack, and preferably directly opposite that portion of the rack engaging the pinion, wherein the yoke is urged against the rack bar by a spring biased slipper in wedge-fitting, sliding relationship with the yoke. The slipper and yoke have inclined mating surfaces which establish a nonreversing wedge angle relationship so that the spring bias need only be sufficient to take up looseness and wear without supporting the load on the yoke.