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10 Bolt And 12 Bolt Rear Axle ?

Discussion in 'Chevy/GMC 4x4' started by BlazerGuy, Aug 30, 2005.


  1. BlazerGuy

    BlazerGuy
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    Whats the difference between a 10 bolt and a 12 bolt rear axle ?, is the 12 bolt a lot stronger than a 10 bolt ?.
     

  2. outalne94z71

    outalne94z71
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    the 12 bolt truck axle is weaker than the 10 bolt truck axle. it has smaller pinion bearings
     

  3. Mr.SelfDestruct

    Mr.SelfDestruct
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    Huh? I did not know that.









    Good info.
     
  4. Mudfrog

    Mudfrog
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    Are you sure? I have never heard of that.



    Either way, the 12 bolt does have a larger R&P as well as axle shafts, so I guess it would be a trade off. If I had to chose one I would chose a 12 bolt.
     
  5. jwglover

    jwglover
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    The 12 bolt has a 8 5/8 ring gear with 12 little 3/8

    bolts holding it to the carrrier( you will break them ) with 30 spline axles

    the 10bolt is a 8 1/2 ring gear ( not much smaller )

    and 10 , half inch bolts holding it to the carrier, with 28 spline axle,, unless you get the 88 -91 blazer or suburban ,they come with 30 sline axles.



    but what you need is a 14 bolt semi float,,

    9 1/2 ring gear, half inch bolts. and ( i think )

    33 spline axle shaft.



    guess what,,,,, I got one !!! for sale

    3.73 gears,pozi ( factory) disc brakes, 6 lug,
     
  6. Mudfrog

    Mudfrog
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    The 12 bolt R&P is 8.875"
     
  7. shin

    shin
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    how much for the 14 bolt....
     
  8. ctobias

    ctobias
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    Well how new do you want it?
     
  9. jwglover

    jwglover
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    $400 plus the ride ,on 14 bolt sf. 3.73 posi ( not locker ) disc brakes
     
  10. 1TONSUB

    1TONSUB
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    Rip off :roll: sorry man, you can get a FF with discs and a detroit for $500. I paid $50 at the local PnP for mine.
     
  11. Bosco

    Bosco
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    also, the 14 bolt has a 10.5" ring gear.. kinda sad that im not a chevy guy and know that.. but yet you have one for sale and dont
     
  12. outalne94z71

    outalne94z71
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    only the 14 bolt ff has the 10.5 ring gear(new aam ones have 11.5)

    the sf 14 bolt has a ring gear dia. of 9.5
     
  13. wildmanben

    wildmanben
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    well so far, I have broke a carrier and two axles in a 10 bolt, a posi in a 12 bolt and wrecked it all. The 14bff is still going strong though.
     

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