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Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
My 06 "Street Bob" had an O-Ring inside the derby.. when I replaced the derby I picked up a gasket for it. It is easier to install then the O-Ring.Ifthederby you have doesn't have a O-Ring groove, you will need to get gasket.
No oil spillage but be careful breaking loose the bolts. I changed mine last weekend and stripped four of the five bolts, breaking several Craftsman wrenches. Had to drill the heads off.