Rocking while towing

DA,
Rocks in what direction - to/fro or side to side? Or more vertical bouncing?
Type of hitch?
Change in the 303 loading vs earlier trips?
Any change in the truck's rear sagging loaded? A 303 should not cause compression to the point where the rear wheel well height over the tire is less than the front. My heavier 337 doesn't on my 2500.
Does the truck drive/feel differently unloaded?
Did you check under the truck's rear suspension to make sure the coils and other components look good?
Thanks - Carl
 
TV front to rear rocking would mean to much loaded weight in either front or rear of RV 5er (we once placed our bicycle carrier w/bikes on our 2" rear RV hitch without counter balancing that weight in the front. Caused the TV/RV to porpoise badly front to rear over bumps). Solved by keeping more weight in front.

TV side to side rocking would mean possible TV issues. Have had a single path (one air line to both) air bag system. Noticed that the pressure balance between the 2 bags via the single air line during turning would cause some side rear suspension lean. Solved by installing dual path air line system and aftermarket Hellwig swaybar.

Good luck.
 
We have a 3/4 ton Ram and tow a 303rls. Our truck rocks significantly more while towing than it used to. Any ideas why?
If you have a newer RAM 2500 with coil spring rears, the shocks may be going bad. The coil springs may be rebounding more than they used to.

If you have the auto level air bags, are they working?
 

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