no doubt they all add (think springs are the same), but I suspect the additional tires are the biggest benefit. Funny but all of those things are the downside to a dually. That's why I was struggling. But in the end, what I might have gotten away with is probably the wrong thing to do. I was hoping everyone would say: I've done that, SWR are great, no problem. Was hoping.............

now, manual or auto???