14 bolt rear question

Discussion in 'Street Build Threads' started by Dominooch89, Oct 30, 2020.

  1. Dominooch89

    Dominooch89 Newbie

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    What is the newest 14 bolt semi float with posi? Meaning what truck did it come on model and year if anyone knows. I’m building a custom rear axle and it has to be a semi float I want to get something nice with less abuse mileage and rust though thanks in advance
     
  2. ameadows7

    ameadows7 I'm Awesome

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  3. someotherguy

    someotherguy I'm Awesome

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    None with posi. Zero.

    Richard
     
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  4. ameadows7

    ameadows7 I'm Awesome

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    Probably just saying posi in the general sense as describing limited slip. I’m assuming that’s what he meant anyway
     
  5. Supercharged111

    Supercharged111 I'm Awesome

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  6. 454cid

    454cid Sooper Pooper

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    GM doesn't use a limited slip in trucks....its either a locker or open.
     
  7. ameadows7

    ameadows7 I'm Awesome

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    I’m not trying to argue with you, just basing this off the link I posted which could very well be wrong but they say “In 2014 this axles was changed to the GM 9.5" 12-bolt axle with a 12 bolt differential cover to distinguish it from this 14 bolt model.”

    I had to google the semi float axle to see it’s year range because I didn’t know they were even put in the trucks after GMT400s

    Semantics, really. I’m sure that’s what the guy meant. And the G80 doesn’t really act like an actual locker anyway
     
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  8. 454cid

    454cid Sooper Pooper

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    No it's not semantics. The G80 in trucks is a locker.
     
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  9. stutaeng

    stutaeng I'm Awesome

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    I think 454cid corrected me on this also on a another thread...

    So the G80 IS a locker because both wheels do get locked together when it activated. As opposed to a LSD, which allow slippage on one wheel, i.e., left and right wheel turn at different rates.

    I don't even know what "Posi" means now. I think some marketing thing from the 70s on muscle or pony car era? Which I think was still LSD?

    In retrospect, GM may have marketed the G80 differently, but they didn't, so people gave it the marketing names of yesterday...

    When I think "locker" I think air or e locker, which are selectable. The G80 is an automatic locker. It does the selecting on it's own.

    Anyways, I'm interested in the OP's question...
     
  10. Supercharged111

    Supercharged111 I'm Awesome

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    Sounds like we're both right. 14 bolt refers to the bolt count holding the ring gear to the carrier. It's merely a coincidence that the cover has 14 bolts. The important thing is that they still make the 9.5" diff, that's what people want when they go for the 14 bolt.
     

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