DetroitDan
Full Access Member
No, it's not a WD hitch, just a replacement for the receiver that plugs into the hitch on the truck. As for the porpoise, it's only when the back wheels of the truck hit a big bump or dip and throw the front of the trailer up, then you feel it come back down. Seems normal enough to me. If it were doing it all the time I would be concerned.