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What are the spec's on the GTO rear-end

This is a discussion on What are the spec's on the GTO rear-end within the GTO forums, part of the Vehicle Specific category; Does any know the size and spec's for the GTO rear-end. I know the ratio is 3.46 but don't know ...

  1. #1
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    RED
    2004 GTO

    What are the spec's on the GTO rear-end

    Does any know the size and spec's for the GTO rear-end. I know the ratio is 3.46 but don't know the size and bolt type.

  2. #2
    Grand Imperial Wizard Sarge's Avatar
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    Hey man...now I thought you had broken all of your rear end Didnt you already replace your posi/drivetrain? Or was that GTODoug...hell I can't remember....

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    No that was not me I just bust my rear-end getting to work and going home.

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    Grand Imperial Wizard Sarge's Avatar
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    Well......I am old and senile
    I beleive the stock rear end is a 7.5 inch 10 bolt POS basically from a S-10...
    Go Moser and be done with it The Harrop Diff cover does significantly improve things...and subframe bushings should be good to go up to arounf 450RWHP....then your gonna need drive shafts / axles etc. It never stops does it

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    RED
    2004 GTO

    Thanks I am looking to change out the Ring and Pinion gear to something different not really looking for it to handle more power. I am planning to stay below the 450 HP range and will not be drag racing the car.

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    Impulse Blue
    2004 GTO

    10 bolt from S-10?

    The rear gear is small, can't remember what it actually was as its been awhile. But is was 7-7.5 on the back side and another inch on the tooth side. About twice as thick as a GM 7.5" 10 bolt. Gear contact is also quite big.

    They are extremely strong for their size. Many Monaro/Commordore's running 11's without problems. Some in the 10's too.

    Diff Technics sells gears for this rear. They are not a sponsor over here so can't really give the url.
    Rob
    04 GTO
    96 WS6

  7. #7
    Grand Imperial Wizard Sarge's Avatar
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    Quote Originally Posted by Rob
    10 bolt from S-10?

    The rear gear is small, can't remember what it actually was as its been awhile. But is was 7-7.5 on the back side and another inch on the tooth side. About twice as thick as a GM 7.5" 10 bolt. Gear contact is also quite big.

    They are extremely strong for their size. Many Monaro/Commordore's running 11's without problems. Some in the 10's too.

    Diff Technics sells gears for this rear. They are not a sponsor over here so can't really give the url.
    I was making an hypothetical analogy to stress a point They are rather flimsy stock....

  8. #8
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    RED
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    Thanks I was looking for some different ratios then what they sell.

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