Vibrating rear end

[davesz06]

My 2008 superduty diesel is supposed to have limited slip rear end but i noticed that only one back wheel spins when i have my trailer hooked up and the roads are wet. When i take off from a red light with an 8000 lb. trailer hooked up to my bumper hitch I spin.Is this normal or do i have an issue with the rear end?

[JSchuricht]

Crawl under the truck and check the tags on the axle to verify you actually have a LS. If you do and your under warranty so I would take it to the dealer.