This is the rear hub seal retainer. (Modification for UG12012/3) In 1986 (from VIN 15800 approximately) the last of the carburetor engine models had the rear hub grease seal modified to a PTFE lip...

This is the rear hub adjusting nut.  Usually required when changing out brake rotors. When adding the nut you may need to replace O ring (UG11161) 1966-1980 VIN 1001-41686 1980-1998 From...

This is the felt needed when replacing the rear hubs.  1966-1980 Silver Shadow I,II,III, T-series, Silver Wraith II 1981-1998 Silver Spirit, Silver Spur, Mulsanne, Turbo R Pre...