Rear brake drum seal surface tapered in Technical Posted August 12, 2018 14 hours ago, PFitz said: There rarely is any need to put in a modern lip seal with a tapered rubbing surface. Yes, figuring out where on the taper it contacts so you can get a lip seal the right size is tough. And modern lip seals won't last as long as the original leather or felt seals do. The originals have afar greater contact width so the force per square area is less. Plus, felt and leather hold oil to better self lubricate and they work better at excluding dust in the contact area so they wear the contact surface far less over the same miles traveled than a modern lip seal will. But, when dust gets in under the edges of a lip seal by mixing with the oil there, it becomes a grinding paste. Within a few thousand miles it will not only wear the very thin contact edge of a lip seal, it will also grind a groove in the contact surface. That's why they also sell press-on repair sleeves for standard sized lip seal contact areas. As I mentioned above, you can remove the leather or felt seal from it's sheet metal retainer, wash it in solvent such as lacquer thinner, and then place strips of paper down inside the retainers to shim the leather/felt back to an original snug fit. Then it's good for another lifetime or two. Paul So you know of a source for a sleeve to fit a tapered surface ??