Make sure the steering box bolts are not just bottomed out on the steering box threads. Sometimes the bolts can bottom out on the threads before it completly tightens the steering box down to the frame, and cause you to think the steering box is tight, when it is not. Throw couple of flat washers on the bolts to shim them back a little, so they will not bottom out, and see if this works. THEN GET YOURSELF A STEERING BOX BRACE AS SOON AS POSSIBLE. Watch out for the same "bolts bottoming out" thing with a steering box brace as well. The best way to securly bolt a steering box to the frame is to drill out the bolt holes, and run a bolt all the way through it. Then put a nut and washer on it.
