Kelly is a blue truck with a yellow crane arm originally to belong to Miss Jenny's father. He is perhaps the leader of the Pack.
Season 10: Bee Yourself, James (cameo)
Season 13: The Duke of Hazard
Season 14: S.C.Ruffey's Sweet Tooth (cameo)
Kelly is perhaps based on a real crane; due to him being a crane - however, the specific basis is unknown.