Forum Discussion

Kidoo's avatar
Kidoo
Explorer
Jul 21, 2017

Need info on Rear Axle Seal

Hi, since last November, I had oil seals replaced 4 times on the rear axle and they still leak. I need some info on the seals used and liked to know if anyone had seal replaced and which part number they used. I have a Roadmaster chassis on a Monaco Cayman 2003.

First replacement they used an SKF seal part number 34384. Two of them installed by different shops leaked pretty bad.
Second was a National seal 370047A, 3 of them leaked, installed by different shops. Those two seals are interchangeable.

Now, I phoned Monaco and they refered me to Dana Spicer, Dana told me the seal to be used on my Dana S150 specific part number is a Spicer part number W20HH100. I cannot find any cross reference for this seal and it is a rare find, but I finnaly found one. This seal is also used on a W20 and W22 Workhorse part number W8000276.

I also found some info on this site: http://www.oemys-performance.com/whparts3.htm.

I you have any info. please let me know, thanks.
Class A
  • Kidoo's avatar
    Kidoo
    Explorer
    Jul 21, 2017
    The vent is clear, no problem with it.

    The shop ordered two new seals with Dana Spicer part number W20HH100, there is no interchange for this seal and it seems to be the same as W8000176, workhorse chassis. They ordered from a shop that repair differential and transmission on big rig.

    I would think it is the same as an SKF35000.

    Hope it will do.
  • azrving's avatar
    azrving
    Explorer
    Jul 21, 2017
    Whokares2 wrote:
    I have installed may speedi-sleeves, I use a low flame propane torch to warm the sleeve up and it will slide right on. Once it cools it contracts to the axle. I believe Stemco is primary maker of these.


    Lol yep. It was a regular routine with skid loaders that ran in mud or coal all day.
  • Whokares2's avatar
    Whokares2
    Explorer
    Jul 21, 2017
    I have installed may speedi-sleeves, I use a low flame propane torch to warm the sleeve up and it will slide right on. Once it cools it contracts to the axle. I believe Stemco is primary maker of these.
  • Bruce_Brown's avatar
    Bruce_Brown
    Moderator
    Jul 21, 2017
    Something isn't right, for sure. The speedi-sleeve will solve the issue IF the shaft is worn. Anyone replacing the sleeve should know if it's needed or not.

    The other issue may be the seal gets damaged when being installed, either when pressing it in or when the axle is reinstalled. That is fairly common but you'd think one of the shops would have done it right.

    If that checks out I'd also check the axle for any runout. Those seals aren't designed to handle any runout so if the axle was off by even a few thousands it would cause premature seal failure.

    On a side note I sell these seals as part of my real job and have installed a bunch of them over the years. There isn't any magic to them but they do need to be installed properly.
  • DSDP_Don's avatar
    DSDP_Don
    Explorer
    Jul 21, 2017
    Years ago, we were on a trip with our Chevy truck and Lance camper. Three times on the trip, the rear axle seal blew. I kept replacing it because it was oiling up the brakes. Apparently, the seal surface had lost some diameter and wouldn't seal. I found a company that made sleeves that slid over the axle and then you installed the seal. The sleeves looked like a section of a soup can. This solved the problem. Sorry, but I don't remember what they were called.

About Motorhome Group

38,707 PostsLatest Activity: Feb 18, 2025