Relacing Ball Joints, and any other maintenance item I have to touch while I've got it torn apart. The ford service manual refers to a rolling diaphragm seal that fits over the stub shaft. Mine are torn. I can't seem to find a rolling diaphragm seal at my parts store. Does anyone know the trade name for this part?

 

most likely the dust seal where the axle meets the spindle. I don't think I've ever had one that wasn't torn. Just make sure to lube the spindle bearing with grease when assembling. I have a hard time locating these seals at our parts department and I work for Ford dealer. I wouldn't lose any sleep over it.

 

Thanks - I was confused by some parts diagrams calling for a left and right-side seal - Finally went to the dealership for advice - they told me I had what I needed, the left and right side issue was deeper into the axle housing, and I'm not going there!