What type of hitch do you have? Brand and what size weight distribution bars are you using? There are a couple of options around sway control ... you could add a friction style sway bar ... probably your lowest cost option but also the least amount of sway control. For better sway control you could update to a Reese dual cam system or to an Equalizer hitch. There are proponents of both hitch brands on the forum. I've used both Dual Cam and Equalizer and both are good products ... from a personal preference I prefer the Equalizer as I think it is easier to set up, easier to hitch and unhitch, and I had better luck with my Equalizer components holding up over time.