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Rear axle

This is a discussion on Rear axle within the Drivetrain forums, part of the LSx Technical Help Section category; In % efficiency...to get a little more technical. The 12 bolt is 3% less efficient than the 10 bolt...and the ...

  1. #21
    Moderator 35th-ANV-SS's Avatar
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    In % efficiency...to get a little more technical.

    The 12 bolt is 3% less efficient than the 10 bolt...and the 9" is 3% less efficient than the 12 bolt. So that makes the 9" 6% less efficient over stock all-in-all.

    At least this is what I read in a magazine once

    I don't know how the Dana sizes up, but it would be even more than 6%.

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    Quote Originally Posted by 35th-ANV-SS View Post
    In % efficiency...to get a little more technical.

    The 12 bolt is 3% less efficient than the 10 bolt...and the 9" is 3% less efficient than the 12 bolt. So that makes the 9" 6% less efficient over stock all-in-all.

    At least this is what I read in a magazine once

    I don't know how the Dana sizes up, but it would be even more than 6%.

    Sounds right to me. The efficiency is related to the amount of pinion offset from the centerline of the ring gear.

  3. #23
    Junior Member whitetrashbird's Avatar
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    Once upon a time, Car Craft or Hot Rod one did a really good write up comparison of the 3 different rear ends. I couldn't find it now but did find this pretty informative article on 9" and 12 bolt http://www.carcraft.com/techarticles...ord/index.html

    Dan

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