I have a 1997 cummins, 4x4 automatic with 127,000 miles. About 2 years ago I replaced all the balljoints, trackbar, wheel bearings, and front brakes. Before I did all this my truck drove great, drove like a dream had no trouble at all. Ever since it wants to wander all over the road if I correct and steer to the right it wants to go way to the right, and if I correct that to the left it wants to go way to the left. Just bought a 28 ft fith wheel camper and about lost the whole rig when passed by a bus on the interstate. The front end has been alighned 3 different times each time it is a little better but still not correct. A few weeks ago I put on brand new tires and the wander got really bad again. I have adjusted on the steering box as well but nothing seems to help or totally solve the problem. When I bought the truck it had 245 tires on it I am now on my second set of 265 tires. Replaced all the parts in the middle of the wear on the first set of 265s. Want to take family camping as much as we can be for cold weather comes, but scared to have my little boy in a truck I can't hang on to. Been pulling trailers with this and many other trucks for over 15 years so this camper is not my first pull. Any and all help very much need extremly frustrated!!!!!!!!!!!!!!!!!!

 

Well it sounds like you have play somewhere. Since you replaced all the parts and had an alignment, I would say check the universal joint that connects the steering box to the steering shaft.

 

Stock steering box?
Have you replaced the intermediate shaft?
Is there play in the steering wheel if sitting still?
Have you tried to wiggle your wheels again to see if there's play?

 

shackles mounts for the springs possble loose , look hard at your steering shaft and gear box for the steering