A 24 foot long rig built on a Ford E350 chassis with a standard 158", will have a lot of rear over-hang to increase the wandering effect. The rear sags lower and the front lifts higher.
Our 2007 E350 chassis Phoenix Cruiser fits that description. Back in the day, a 2007 and older E350 had "NO" rear stabilizer bar of any kind. In the end, I did many upgrades to improve stability, quality of ride, and control.
I agree with Capt Steve. First, weigh your rig during a trip, then adjust the tire pressure accordingly. For reference, our rig's weight distribution requires 47 PSI in the front tires, and 63 psi in the rear tires.
Also per Capt Steve, a front wheel alignment is also essential. With your rig fully loaded for a trip including water and fuel, minus occupants, make a reasonable good effort to add weight in the appropriate seating positions to represent the people you typically accommodate, and represent perishable food as water in containers. The better you simulate your trip condition, the better your wheel alignment.
Once complete, you will notice improvement. If still not satisfied, the list goes on and on. I made the following list of changes.
- added a heavy duty rear stabilizer bar
- replaced the stock front stabilizer bar with a heavy duty version
- replaced the stock shocks absorbers with heavy duty Bilstein RV shocks
- replaced the stock steering stabilizer with a heavy duty Safe-T-Plus
- added a rear trac bar
- replaced the front coil springs with a pair that are one rating lower.
It is a scary long list, but if you do most of the work yourself, and shop wisely, it will set you back a couple of thousand dollars. I considered most to be fairly easy for a do-it-yourselfer.
The last item on the list draws many questions. CLICK HERE
for my write-up (with many pictures) on that one.
Being the "picky" guy that I am, I am still chasing down a very minor steering wander that I have a plan of attack to address, hopefully done soon. It involves a reinforcement plate where the steering stabilizer attaches to the frame.