Stan944

The rack developed some play: it makes a knocking noise when going over a bumpy road, I could twist the rack several degrees wit respect to the pinion (after pulling the driver's side boot aside). I adjusted it (with the screw at the front) two weeks ago, and now it's the same. I did it again, but don't know how long it will last. Anybody had similar problems?
P.s. it's a manual rack.