I have been chasing steering issues on this Disco since shortly after I bought it. Steering was solid when I bought it but I decided to flush the power steering system and everything went downhill from there. Here's the history over the past 2 years:

1. Steering box started leaking after flush so I replaced the steering box with a used one.
2. I damaged the Universal joint and coupling so I replaced that too
3. Then the power steering pump started leaking so I replaced that and the lines
4. Used steering box started failing so I replaced it with a remanufactured one
5. Added a new steering damper and drag link and had alignment done
6. Replace the steering box again with a different remanufactured one.

Steering is still sloppy loose between 11-1 so I am constantly steering the truck rather than holding it in a "sweet spot."

I've tried adjusting the steering box but it just makes steering harder without removing any of the slop.

So not sure where to go next on this. Any thoughts would be appreciated.

 

I've done about everything you have except the pump. Mine is similar. I even have castor correction arms.

 

I saw this thread. Might check this out the ball joints and see if I can see anything obvious.

https://landroverforums.com/forum/di...94/#post787622

 

I'm actually doing ball joints this month along with new front brakes and hubs. My boots on the front ball joints have been torn for 6 years. I bet they are dry as can be, even if there in no play. It's finally time. I'll report back after.

 

I can report that I had a little more vagueness than I liked at higher speeds... so I had a local shop replace my balljoints. And the steering rods (both of them). And the steering stabilizer. Treated myself instead of doing it myself. Disco Ball joints are a real hassle for the driveway mechanic and I didn't want to do them on this one after doing them on an old Disco 10 or 15 years ago myself.

No leaks in power steering, fluid is fresh, and I can report that ... my steering feels EXACTLY the same after spending 1400 bucks to have a local shop do the above. And now my axle is leaking badly from all the banging from the ball joints Sigh. Perhaps I should have left well alone.

All 4 of my ball joint boots were torn (they were original, with 110K miles on the Disco) so I also figured this was the problem, apparently not.

 

Hmmm. On my Disco, the steering coupler and arm has no slack in it and every slight turn on the wheel (even between 11 & 1) is transmitted to the steering box. Therefore I have to believe this is in the steering box itself.

Although I have gone through 3 "rebuilt" steering boxes, they all result in the same issue: sloppy steering between 11 & 1. It leads me to believe that maybe the only thing that was rebuilt on my units was the seals.

$1400 for a new box so not going that route
$500 for a "rebuilt" unit and that has not helped me a bit.

I might reach out to Will Tillery and see if he has a solid unit I can get. Still thinking about this though.

 

Could be the steering box adjuster screw needs to turned in a bit. It is properly adjusted at the point where there is almost no backlash at center and no preload (pressure) on the sector shaft.

The adjuster screw is the one in the center of the top cover. The locknut has a seal washer that might need to be refreshed. The shop manual describes adjustment as a two person job, one rocking the drop arm while the other slowly tightens the adjuster screw until almost no more rocking.

 

I’ve messed with the adjuster screw but never did it as a 2 person job. Maybe I’m doing it wrong?