This is a good used window lift assembly.  All you need to do is unbolt yours and put this one in.  These units are tested in good working condition. All 4 door cars from 1987 (#20001) to...

This is the main driven wheel and sprocket assembly. The part sits inside the gearbox that is attached to the electric lift motor. 1966-1980 Silver Shadow, Shadow II, T1-1, T-2, Silver Wraith II...

This the mounting bush located at the base of the electric window lift assembly (UB12705) on SZ 4 door models from 1980-1998. It is also found riveted to the bottom of the window lift channel...

This is the nylon coupling between the cog on the electric window lift motor and the worm shaft inside the gearbox.  1972-1978 All 4 door models from VIN 13754-36421