i know on landrover/rangerover boxes you can get shims to take up the play,dont over do it or youll never turn the steering wheel.
years ago my rangie failed the mot on play in the box,put a reecon box on it,and the mot twat still failed it,took it back home swapped em back,pack it out with shims,had to drive it back to the test station in 1st gear coz i couldnt turn the wheel it was that tight,it passed, back home shims out,reecon box returned everyone happy