Is the cylinder leaking or is it an axle seal? The difference in liquids is obvious. If the seal is leaking it will enter the brake and get onto the shoe. Hopefully it is a cylinder and not the axle seal.
This is a good time to remind everyone to make certain the breather on the rear axle is free and not clogged.


1949 Chevy 1/2-Ton
"Sedgewick"
In the Gallery
1989 Caprice