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Rear or Gears?

This is a discussion on Rear or Gears? within the Drivetrain forums, part of the LSx Technical Help Section category; I have a 98 formula with about 120,000 miles on the stock rearend. My codes read GU2 which I believe ...

  1. #1
    Junior Member hat*ls1*98's Avatar
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    Rear or Gears?

    I have a 98 formula with about 120,000 miles on the stock rearend. My codes read GU2 which I believe are 2.73's... So I know that I'm being robbed at the low-end...

    So my question is would you guys encourage putting in some better gears, or just wait till the stock one is shot and replace it with a stronger rear-end all together?

    Has anyone done a gear swap with as many miles as me?...

    Thanks for looking.....

  2. #2
    Veteran Hi-Po's Avatar
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    Check around here, everywhere. Save your money and put it towards a 9"... maybe a 12 bolt

    Dont dump money into that 10 bolt.

  3. #3
    Just me Y2KPewterSS's Avatar
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    I would wait and just upgrade the entire rear. My thought process, eventually the 10 bolt is gonna blow, so why throw any money away on it. If you spend $200 on new gears and then $$$$ for install, thats money down the toilet if/when the 10 bolt blows. That same money could have put you closer towards an upgraded rearend.
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    Junior Member hat*ls1*98's Avatar
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    good points and thanks for the advice guys...

  5. #5
    2 SS's are better than 1 Jays00ss's Avatar
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    Yes absolutely, Rule of thumb is to upgrade and not rebuild with the POS 10 bolt
    2000 SS Camaro Heads, Large cam, Fast 90, 9"w/430's and locker, yada yada yada... you get the picture

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  6. #6
    Moderator Cutlass's Avatar
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    A stronger rearend is always the better option, but I might not pass over a cheap used 10 bolt rearend with 3.42s or something if you want a quick cheap (possiblly temporary) upgrade. Honestly a 10 bolt is fine for a mostly stock automatic LS1.

  7. #7
    Junior Member BoneGrid's Avatar
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    If your an auto then you can maybe get by with a used 10 bolt as some said, but it may only be temporary.
    I invested in a moser 9 inch, couldn't be happier with it.
    2002 Camaro Z28 FQuick.
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  8. #8
    Member anniversary30's Avatar
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    9" all the way, don't bother with anything else.

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