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12 bolt or 9''

This is a discussion on 12 bolt or 9'' within the Drivetrain forums, part of the LSx Technical Help Section category; i want upgrade to either a 12 bolt or a 9'' what do you guys suggest. and where is a ...

  1. #1
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    black
    99 trans am

    12 bolt or 9''

    i want upgrade to either a 12 bolt or a 9'' what do you guys suggest. and where is a good place to get a full rear end.

  2. #2
    Veteran Blackbird WS6's Avatar
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    9" FTW, some will say if you have a a4 the 12 bolt is fine but if your going to change it do it right the first time and you will not have to think about it again IMO

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    Member anniversary30's Avatar
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    buy the boat anchor 12 bolt I have. 1000 and it's yours

  4. #4
    Veteran Hi-Po's Avatar
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    12 bolt here.


    9" you should buy.

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    Member zmg00camaross's Avatar
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    2000 camaro ss

    Just got my 9inch housing today it's awesome

  6. #6
    2 SS's are better than 1 Jays00ss's Avatar
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    NBM / Silver
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    9" without question. Buy it from Quick Performance Raceing. A store on E-Bay. Best prices anywhere and outstanding customer service.
    2000 SS Camaro Heads, Large cam, Fast 90, 9"w/430's and locker, yada yada yada... you get the picture

    1971 SS ElCamino 402 Big Block 550HP

    2006 Silverado 2500HD 496 cubic inches of pure muscle

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    onyx black
    1999 formula firebird

    9" all damn day long .. fix it and forgett it

  8. #8
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    Dana ... ... lol, had to throw this in there

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    Member Blue_01_Z28's Avatar
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    Quote Originally Posted by That Guy 2-1 View Post
    Dana ... ... lol, had to throw this in there
    I don't mean to steal the thread but i'm looking for a rear end too. How is the S60. From what I have researched its just as good as the 9" and a slight cheaper. Is this correct?

  10. #10
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    Quote Originally Posted by Blue_01_Z28 View Post
    I don't mean to steal the thread but i'm looking for a rear end too. How is the S60. From what I have researched its just as good as the 9" and a slight cheaper. Is this correct?
    I think I falls right in the middle of the 12bolt and the 9" in terms of strength, weight and power loss 'cos of drag ... I could be wrong, this is from my own experience with installing and working on all 3 types. Although the Dana would need a shorter driveshaft (the 9" only needs the u-join changed), so that's an additional expense. I guess price would be dependent on the options of each setup, but yeah, it is kind of a deal.

  11. #11
    Member anniversary30's Avatar
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    I like my 9" but if it is a moser(mine is), check the gears and have them reset before the install. I didn't and they scream at me all day. Now I need to get a new ring and pinion and have them set correctly.

  12. #12
    2 SS's are better than 1 Jays00ss's Avatar
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    Quote Originally Posted by anniversary30 View Post
    I like my 9" but if it is a moser(mine is), check the gears and have them reset before the install. I didn't and they scream at me all day. Now I need to get a new ring and pinion and have them set correctly.
    Mine is almost as quiet as stock. I got a Strange Pro Nodular and the guys at Quick Performance KNOW HOW to set up gears. However with any aftermarket rear end and gears, it won't be completely quiet like stock. You want to play you'll have to pay.

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    Member anniversary30's Avatar
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    I agree and have learned that lesson. Had i been a little more informed I would have had them reset the gears instead of going with mosers set up.

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    Senior Member INMY01TA's Avatar
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    I always say for an auto, 12 bolt. Six speed, 9 inch.

  15. #15
    Veteran Hi-Po's Avatar
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    I hope my gears are set up good from Moser.

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    Member anniversary30's Avatar
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    I talked to them the other day< they told me on the phone they set them up at 12 thousands.....I would check them before you install and get the wear pattern in the gears. Otherwise you'll be gettin new ring and pinion like I am. Doesn't hurt to check before. My bud told me they should be between 8 & 10 thousands.

  17. #17
    Veteran Hi-Po's Avatar
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    Quote Originally Posted by anniversary30 View Post
    I talked to them the other day< they told me on the phone they set them up at 12 thousands.....I would check them before you install and get the wear pattern in the gears. Otherwise you'll be gettin new ring and pinion like I am. Doesn't hurt to check before. My bud told me they should be between 8 & 10 thousands.
    too late, its already installed. When I got it, it still had fresh paint marking's on all the teeth. It looked great, I can only hope

  18. #18
    Moderator 35th-ANV-SS's Avatar
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    I just picked up a Moser 9" with 411 gear and am having it installed by EPP.

  19. #19
    Veteran Hi-Po's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    I just picked up a Moser 9" with 411 gear and am having it installed by EPP.
    Me to, Bob is a GREAT guy to deal with. I installed myself... How much was the install?

  20. #20
    Moderator 35th-ANV-SS's Avatar
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    Quote Originally Posted by Hi-Po View Post
    Me to, Bob is a GREAT guy to deal with. I installed myself... How much was the install?
    He is also doing some other items, but just for the 9", fluids and install was $500.

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