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Technical Rear Wheel Seals

Discussion in 'The Hokey Ass Message Board' started by Hdonlybob, Apr 3, 2020.

  1. Hdonlybob
    Joined: Feb 1, 2005
    Posts: 3,964

    Hdonlybob
    Member

    I have forgotten much lately (at 76) but rely heavily on a good friend that also has classic car shop.
    I had him do my annual oil/grease/fluids/etc check this week on my '63 Biscayne.
    He called me and told my the rear wheel seals were just starting to leak...to which I told him go ahead and change them.
    Paid for it yesterday and was kinda surprised that he also changed the rear wheel bearings...
    He told me it is pretty much necessary to do this..
    I have no objection, just curious...
    Thanks much.
     
  2. 325w
    Joined: Feb 18, 2008
    Posts: 5,652

    325w
    ALLIANCE MEMBER

    You got a good mechanic taking care of your car. He did right.
     
  3. manyolcars
    Joined: Mar 30, 2001
    Posts: 8,510

    manyolcars

    I bet you are talking about rear axle shaft seals
     
    lothiandon1940 and Hdonlybob like this.
  4. Doublepumper
    Joined: Jun 26, 2016
    Posts: 1,080

    Doublepumper
    Member

    Worn bearings are usually the first thing to start seal wear. Your friend did the right thing by replacing them.
     
    mgtstumpy and lothiandon1940 like this.

  5. Mike VV
    Joined: Sep 28, 2010
    Posts: 2,441

    Mike VV
    Member
    from SoCal

    Um...the "wheels" have...seals..?
    Where have I been, I didn't even know that wheels HAD...seals.

    Mike
     
  6. Hdonlybob
    Joined: Feb 1, 2005
    Posts: 3,964

    Hdonlybob
    Member

    Thanks much,
    Pretty much what I remembered from years back...
    Sad that I can no longer do this stuff myself..but hey, I still can enjoy driving it :)
     
    Max Gearhead likes this.
  7. Axle shaft seals on passenger car rear axles and wheel hub oil seals on full floating rear axles.


    Sent from my iPhone using The H.A.M.B. mobile app
     
  8. squirrel
    Joined: Sep 23, 2004
    Posts: 49,828

    squirrel
    Member

    The seals are part of the wheel bearing assembly on those cars. So yeah, he had to change the bearings to replace the seals.
     
    porknbeaner likes this.
  9. Jim, I just looked on Rock Auto, it looks like the seal is part of the bearing? Does the bearing press on to the axle shaft, like a Ford 9 inch?


    Sent from my iPhone using The H.A.M.B. mobile app
     
  10. squirrel
    Joined: Sep 23, 2004
    Posts: 49,828

    squirrel
    Member

    The seal is part of the bearing. The bearing is pressed on the axle shaft.

    64 was the last year of that in most Chevy cars.
     
    porknbeaner and Truckdoctor Andy like this.
  11. Hdonlybob
    Joined: Feb 1, 2005
    Posts: 3,964

    Hdonlybob
    Member

    Yep Yep...I didn't realize they were pressed on...
    My friend told me that yesterday when I was harassing him about my wife saying she was sick of him taking vacations on us.. lol
    It is ongoing every time I do something to my Biscayne.....
     
  12. 41rodderz
    Joined: Sep 27, 2010
    Posts: 5,613

    41rodderz
    Member
    from Oregon

    We all have to “pay to play “ wether we do it all ourselves or have some one else doing it. Roll on and enjoy .:)
     
    Hdonlybob likes this.
  13. blowby
    Joined: Dec 27, 2012
    Posts: 7,957

    blowby
    Member
    from Nicasio Ca

    I put one new bearing on today before realizing the two bearing sides are different. One side has a seal with an external spring on the inside race, the other side has a flat seal with no spring. Which way do the go?

    Bet I got it wrong...
     
  14. squirrel
    Joined: Sep 23, 2004
    Posts: 49,828

    squirrel
    Member

    The seal is to keep the gear oil out of the wheel bearing, which has grease in it. So....seal in....right?
     
  15. blowby
    Joined: Dec 27, 2012
    Posts: 7,957

    blowby
    Member
    from Nicasio Ca

    Yep sounds good. And the other side probably has an internal spring to keep the grease in, and out of the brakes. Thanks. I would have figured this out on my own if I was't exhausted from getting the old bearings off, what a pain.

    First time I've dealt with sealed rear axle bearings. All I've done just just use the rear end lube. Why sealed bearings?
     
  16. 325w
    Joined: Feb 18, 2008
    Posts: 5,652

    325w
    ALLIANCE MEMBER

    The grease follows the axle to the outside of the housing. By turning the grease gets to the axle bearing then it can leak as the bearing wears
     
  17. Cree
    Joined: Jun 13, 2017
    Posts: 120

    Cree
    Member
    from Montana

    Hopefully not hijacking here, taking opportunity for a possibly related question:
    My Model A's 9" rear has cast housing ends with no provision for internal seal, requiring bearings with an o-ring seal. A new set of axles came with Strange A1021 o-ring bearings installed that had an outer sealed side and an inner side open to the gear lube which seemed odd. The bearings were initially packed with grease. A tech at Strange said these are "drag race only" bearings, which I understood to mean not for heavy side loading. After running a few months, I have a leak on one side and intend to replace the o-ring (plus a little sealant). Anyone have experience with this bearing setup?
     

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