sway bars dont completely eliminate sway though just decrease, otherwise your axel would not articulate at all. only move up and down parallel to the body. do they not serve the same function as torsion bar? i'm not an engineer or suspension designer so i'm not 100%, can you explain in a different way how torsion bar/sway bar work differently? as for the initial question: sway bar for dd, id still say yes. jmo no offence intended.