[JM 35 Sedan]

This is a debatable subject that will never be totally agreed upon by everyone. I have some of these sealed clutch pilot ball bearings that have been in service for years on non daily drivers and they are working well. Anyone replacing a pilot bearing/bushing will need to make their own decision based on the facts and experience they have. Personally, I'll continue using quality sealed ball bearings w/high temperature grease as pilot bearings in my vehicles. If or when I can't get these ball bearings, I would probably use an oil impregnated bushing.