They will both work apparently, the only difference being the inner tie rod ends, and quite possibly the tie tod lengths, not a big deal if I buy a used one....the trw units seem to be a little cheaper than the zf units,, and a more readily available used....
the obvious visual differnce between the two is that the ZF is aluminum cast and so has these waffle-like markings on it, while the trw unit has a smooth steel body...
so has anybody rebuilt one of these themselves?