Ok, I've had my truck for 7 years now and I've noticed in the last year the steering has gotten really bad. I'm now having trouble keeping the truck in it's lane and any trailer load over 7,000lbs is a white knuckle ride at 50mph. The center of the steering is very vaige. I have a lukes link and it's set as tight as I can get it with a 1/2" ratchet. I just readjusted the sector shaft and set it a bit tighter than what it should be. The sector shaft adjustment helped (not as much as it did 7 years ago), but I think it helped narrow the problem further. Now it feels like the tires are turning on their own. The truck will start to head in one direction, either left or right, without any input from the steering. Road conditions don't seem to have an effect, but speed does. The issue becomes noticable over 45mph. I also noticed that although the box is tight, there is still some play in it. The play seems to be before the gear box. I don't mean the steering shaft, but with the box set tight I can feel when the pitman arm turns and the pay is before that point. I don't notice this at rest with the engine running, just when moving. Unless somebody has ideas otherwise, I'm thinking my steering box is worn out. Thoughts? Anybody replace the gear box with good results? How about upgrading the gear box? There are quite a few straight axle trucks out there today, a F550 comes to mind first. Anybody ever try such a swap?