Just wondering if anyone else has run into this. I've replaced all the steering and suspension components on my 87 Suburban, with the exception of the steering box. There's still a little play, but more noticable is the wandering of the vehicle on the highway. It's a lot better than when I bought it, but still not perfect. I've checked the frame where the steering box mounts, and it looks fine. I will eventually be reinforcing it for safety's sake. I also saw that there's a preload adjustment screw (or what looks like one) on the top of the steering box. My questions are: Is this screw adjustable to take up the slop in the steering? How do I tell if the steering box is worn? Anything else that I should check? Thanks in advance!