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Heres a real head scratcher...need some help

Discussion in 'Got gears?' started by 70skylarkcusto, Jul 26, 2014.

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  1. 70skylarkcusto

    70skylarkcusto God, Country, Cars

    here we go....
    Went to replace the pinion seal today and wow what a day it turned into. by the time I had finally gotten the pinion seal out and was ready to put the new one in, it did not fit. Thinking summit racing had screwed up my order I called and was assured I not only got the right part but that this seal did indeed fit a stock 70 skylark. Not only did they not look exactly the same ( the one I pulled out had a flared end) but the old seal is 4mm smaller than the one I was trying to install. After talking to someone from tech there he came to the conclusion I must have had a rear axle swap at some point in the life of the car which is entirely possible since I am the third owner.

    heres where it gets interesting.
    from all the searching on the internet I can find the bolt pattern and diff cover are that of a 8.2 or 8.5 Buick rear axle which both take the seal which I had tried to install.

    So I guess here is my question..... What could I possibly have in my skylark that looks like a buick rear end, but has a pinion seal which is 4mm smaller than stock (overall diameter 2.36 inches)

    Not sure where to go from here. any suggestions?
     
    70skylarkcusto, Jul 26, 2014
    #1
  2. CJay

    CJay Supercar owner Staff Member

    Post a pic of the cover and we can ID it for you
     
    CJay, Jul 26, 2014
    #2
  3. JESUPERCAT

    JESUPERCAT No Slow Boat

    Clean what is left of the seal and see what numbers are visible if any.
     
    JESUPERCAT, Jul 26, 2014
    #3
  4. 70skylarkcusto

    70skylarkcusto God, Country, Cars

    This is the best picture I can get of it at the current moment. If this isnt good enough let me know photo.jpg
     
    70skylarkcusto, Jul 26, 2014
    #4
  5. BrunoD

    BrunoD Looking for Fast Eddie

    I can't see it clearly,but it looks like the 8.2,not the 8.5.Bruno.
     
    BrunoD, Jul 26, 2014
    #5
  6. 70skylarkcusto

    70skylarkcusto God, Country, Cars

    either way, from what I can find online it is the same seal for both 8.2 and 8.5
     
    70skylarkcusto, Jul 26, 2014
    #6
  7. 70skylarkcusto

    70skylarkcusto God, Country, Cars


    Just cleaned it off more and found a number on the back, 1387449, after doing a quick search it looks like its out of a lesabre or a lemans, which, if its out of a lesabre would make sense as to why it has the buick style differential cover. So having said that I think the mystery is solved.
    thanks for your help guys
     
    70skylarkcusto, Jul 26, 2014
    #7

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