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10 bolt... stupid question

Discussion in 'Differential & Driveline' started by 78C10BigTen, Jun 27, 2019.

  1. 78C10BigTen

    78C10BigTen Full Access Member

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    Ok so im looking for a pinion seal for my 10 bolt. Is my 10 bolt an 8.5 ring gear? Yes i know its stupid.
     
  2. Doc_Ellis

    Doc_Ellis Full Access Member

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    lol, no what’s stupid is ordering one based on the description of “8.5” ring gear” and just assuming that’s what you have without looking into it further. That’s what I did.
    Well I have a 12 bolt, 8.875 ring gear or whatever the hell it is so I got a useless to me 10 bolt pinion seal and didn’t feel like bothering with sending it back so I tossed it just the other day.
    Woulda sent it to you for free so it at least didn’t go to waste, dammit.

    tl;dr: yes 10 bolt is 8.5” ring gear
     
    donnieray likes this.
  3. 78C10BigTen

    78C10BigTen Full Access Member

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    Well my question is because i had a 12 bolt and swapped it for a 10 and put in a posi unit and my axles. But i dont know alot about rears. So i ask the knowledgeables on gmsb. Ive got another question comin so stay tuned...
     
  4. varmit86

    varmit86 Full Access Member

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    when you swapped the 12 bolt for the 10 bolt did the 10 bolt have the posi already installed or did you put it in?
     
  5. 78C10BigTen

    78C10BigTen Full Access Member

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    I added it.
     
  6. 78C10BigTen

    78C10BigTen Full Access Member

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    I kept the ring and pinion from the 10 and swapped in a 30 spline posi carrier and my 12 bolt axles.
     
  7. varmit86

    varmit86 Full Access Member

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    You know the ring and pinion gears need to be shimmed to give you the correct wear pattern or the rear end will make all kinds of noise and the gears will wear out very fast? This is something you need to know how to do or have a professional do. It is not just a bolt in thing.
     
  8. 78C10BigTen

    78C10BigTen Full Access Member

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    I have had no issue since i put it in till i did some hard spinning around in my yard. On purpose. Still no noise just a pinion leak. I couldnt shim it anyway because the carrier had no side to side play at all
     
  9. 78C10BigTen

    78C10BigTen Full Access Member

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    So next stupid question... ive never pulled a yolk, is this the correct seal for a 10 bolt?

    Screenshot_2019-06-27-18-09-22.png
     
  10. bucket

    bucket Super Moderator Staff Member

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    Hard to say when it comes to modern chain store listings. But it "should" be the right one.
     
  11. TravisB

    TravisB Full Access Member

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    What posi unit did you put in the 10 bolt? I have been wondering about it myself and have been reluctant to spend any money on it in favor of something heavier.
     
  12. varmit86

    varmit86 Full Access Member

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    looks like there are a couple of posi units on Amazon cost is $400 - $500 looks like it takes a special set of bearing depending on the axles your running.
     
  13. 78C10BigTen

    78C10BigTen Full Access Member

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    Ill look in my purchases. It was a clutch type posi. About 300 on ebay
     
  14. 78C10BigTen

    78C10BigTen Full Access Member

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    This is what i put in it
    This is what i put in

    20190207_162945.jpg
     
  15. Triv

    Triv Junior Member

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