They are simple as inside and not much to rebuild.

I had mine rebuilt for me, thinking that its complicated, only to find a huge bill and that there is bugger all inside.

The one thing that the rebuilder did tell me was that the bearings are hard to find, which seems a little odd. Bearings are bearings, but they wernt too good at following instuctions either so I take that with a pinch of salt.

Its more likly that most of the steering play will be in the balljoints everywhere else, but rebuilding the steering box cant be a bad thing.