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| | | | Joined: Mar 2024 Posts: 126 'Bolter | | 'Bolter Joined: Mar 2024 Posts: 126 | 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
| | | | | Joined: Sep 2009 Posts: 6,045 Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT | | Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT Joined: Sep 2009 Posts: 6,045 | Mike, It most likely is a failed seal, although it could be your vent is blocked which can over-pressurize the axle and force lube out the seals. Either way if it's leaking now then it needs to be replaced. Take a little time and read through Section 4 of the 1955 2nd Series Truck Shop Manual (free access to everyone). I believe the info you need to start with is on Pg 4-5. You will have too remove the axle to replace the seal. BTW - Since you are having to pull the axle anyways, now is a good time to check the bearings and condition of the differential since you must open that up to remove the axles. 
~ Dan 1951 Chevy 3 window 3100Follow this story in the DITY Gallery"My Grandpa Carl's Truck and How it Became Mine"1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
| | | | | Joined: Feb 2004 Posts: 29,886 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,886 | Check both axles for a wear groove where they ride on the bearings. A failed seal is quite often the result of axle and/or bearing wear that lets the axle bounce up and down on the seal as the wheel hits bumps in the road.
Jerry
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