Hitch Extender

#1nobby wrote:
If, say, you attach your trailer and the rear of your truck sags....the WD will bring it back up providing the correct weight transfer.....then what does the self leveling suspension do, if not the same thing?

No, not the same thing at all. Self leveling will make the truck look pretty and does help with carrying junk in the back of the truck when not towing but doesn't do a thing when towing as it doesn't transfer any weight back to the front steer axle as does weight distribution, which BTW also transfers some hitch weight back to the trailer's axle(s). Someday when you have the time you might want to wade through the Ron Gratz Thread - How Weight Distribution Works.