I tow a 3124SL with my F-250SD and get over a 1 inch drop without the equalizer bars. On a rear drive vehicle you could probably do without unless you had a "stretched" full size van. On those the wheelbase is the same as a long base van and with 18" or so extra overhang. Trailer Life once ran an article about the effect of trying to tow with one of those types of vans. I could probably get by without mine but use them since I have them. Also have a left over sway bar from a Jayco pop-up but have never needed with the TrailManor.