rear hub seal help needed.

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Aug 6, 2017 | 06:51 PM

white 66

Thread Starter

Laughing Gas

Joined: Sep 2011

Posts: 916

Likes: 18

From: Colorado

rear hub seal help needed.

Hi Guys, I recently installed a new set of seals on the rear axle for my 1.5 tonner. The set I put on several years ago leaked very soon after driving the truck so I have ignored it until recently due to the accumulating mess. Anyhow started using the truck again and the new set leaks also.

Hubs are in good shape so are the housings (no groves). When test fitting the seals I noticed that they barely hug the axle. I know from the work I do with big trucks this is not correct. Possibly the seals are N.O.S. and have shrunk over the years.

Anybody know what a cross over number would be for the old rear hub seals # BB-1175-C might be? Stemco 2 piece or????

thanks.

Last edited by white 66; Aug 6, 2017 at 06:52 PM. Reason: add text

Aug 6, 2017 | 08:30 PM

49fordv8f4

Cargo Master

Joined: Aug 2014

Posts: 2,594

Likes: 72

From: North Central Arkansas

Mark, The numbers are; National 5751 and C/R 31288. The National seal is leather like the original and the C/R is rubber. I've always used the National seal and had good service with them, although the rubber seal may fit a little tighter on the spindle.
Mark

Aug 6, 2017 | 11:02 PM

GB SISSON

Lead Driver

Joined: Jan 2005

Posts: 6,104

Likes: 138

From: Orcas Island Wa.

I have always been told to soak the leather ones overnight in motor oil so they soften up and swell a bit. The rear axle seals I just put in my 1/2 ton were national and made of leather too. I think it's cool that something like that is still best made from animal hide.

Aug 7, 2017 | 12:13 PM

49fordv8f4

Cargo Master

Joined: Aug 2014

Posts: 2,594

Likes: 72

From: North Central Arkansas

I have always been told to soak them in oil as well. If I have time, I usually let them soak a couple of weeks, although overnite is probably long enough. Same with the front and rear main rope seals on the flathead.
Mark

Aug 7, 2017 | 01:48 PM

white 66

Thread Starter

Laughing Gas

Joined: Sep 2011

Posts: 916

Likes: 18

From: Colorado

hub seals (rear axle).

Quote:

Originally Posted by 49fordv8f4

Thank you to both of you. I will go with rubber this time, don't want to have to do it a 3rd time.

Aug 8, 2017 | 01:05 PM

willowbilly3

Post Fiend

Joined: Jun 2003

Posts: 8,209

Likes: 12

From: Black Hills of SD

I had a full floater on a daily driver I just could not get to quit leaking. The spindle looked fine but out of desperation, I eventually put a speedi-sleeve on and another new seal, it never leaked again, well over 100,000 miles on that seal when I parked it.

Aug 8, 2017 | 08:29 PM