Looking for some help. pulled rear drum off and brakes were wet with oil or grease, has new brake cylinder as of 9 months ago didn't see any brake fluid and master is full. is it rear axle seal ? and how to fix. Thanks for any help

Last edited by Peggy M; 06/02/2024 4:05 PM. Reason: added more info to the title

1955 second series 3200