Lionel-MPC 8206 Steam Engine

This is a message that came through on my Lionel-MPC Yahoo Group site. I have this loco, but mine happily runs without wheel wobble. Does anyone know of the solution to the 8206’s that do wobble ?? I Have a 8206 loco that I received not long ago that is one of the items with the offset wheels that Lionel used when it was made. Does anyone know which wheels need to be replaced? Are they all off center and if so what are the part # for the driver and the blind wheels? Also the one driver has a traction tire. In addition the tender electric pic up on the wheels does not make great contact. The fingers tend tobe bent away from the axles. Does anyone have a suggestion. Thank You Pat