any whining as the wheel is turned ?
suffered this in my girlfriends golf which had a seal dump all its oil out and it was a week of her driving before i checked the fluids again = new rack
quicker you check it out the cheaper it may be – first call check the fluid levels.
on the otherhand check around the bushes and bearings in the front end for any play. My van gave a clunk in steering and going over bumps – was the ARB link.
could also be ball joints.
All would be preferable to a rack – from experiance youll be looking at a 4 figure sum to stick a rack in 🙁 – didnt fancy doing it my self as space was tight in the golf.