Is this vaccum diphragm on the axle with the red vaccum line used to ingauge the front axles(http://i1208.photobucket.com/albums/cc377/shanebo79/2034.jpg)?
The vacuum diaphragm (shift motor) is the greasy part all of the vacuum lines go into.
Its greasy all right!! I hope its still functional...Probably not an easy part to come by.
You can do without it if you want to convert to shift-on-the-fly.
Shift on the fly eh!? What would I need to do that..Id love shift on the fly!!
Some time and a steel hose clamp. We have a How To in the AMC Eaglepedia.