I have a 1968 C60 that has blown a rear wheel cylinder. I removed the axle and now am trying to remove the axle nut. It is a 3 1/2 inch hex nut. I bought a 3 1/2 inch axle nut socket at Napa but it won't fit inside the housing to go on the nut. The wall of the socket is 3/16 metal. I am going to need a socket with much thinner sides, maybe about 1/8 inch. Can anyone tell me where I can find a socket that will fit this truck's axle nut? Thank you very much.