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how hard is it to upgrade 3.42 to 4.10

This is a discussion on how hard is it to upgrade 3.42 to 4.10 within the Drivetrain forums, part of the LSx Technical Help Section category; I just bought a set of 4.10 guts, and have 3.43 rear end, what will I need to do to ...

  1. #1
    Junior Member
    Join Date
    Aug 2007
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    temple ga
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    red
    1998 Z28

    how hard is it to upgrade 3.42 to 4.10

    I just bought a set of 4.10 guts, and have 3.43 rear end, what will I need to do to get the 4.10 into my 98 z28?

    The 4.10 was from a 95 z28 installed by dealership, and has less than 40k miles on them.
    My 3.42 have 110k miles, and I think some teeth are broken, changed gear oil, and lots of metal shavings were stuck to magnet, oil was black and burnt smelling. Now rear end sounds hooooorrrrible.


    Thnx

  2. #2
    2 SS's are better than 1 Jays00ss's Avatar
    Join Date
    Jun 2007
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    Lathrop, Missouri
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    2,479

    NBM / Silver
    00 SS / 71 SS Elcamino

    I would highly recomend haveing someone do it that does them all the time. My buddy did mine. (He used to work at a 4x4 differental shop). There is a lot to set up in doing gears and if you mess it up, there goes all your money instantly. I would also recomend buying a master rebuild kit due to your high miles on your rear. It comes with new bearings. Better yet, save your money and buy a new Moser 9" thats what I should have done and what I'm saving for now!!
    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

  3. #3
    O U 8 1 2 Spaz's Avatar
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    Nov 1999
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    25,693

    []D [] []V[] []D
    1999 trans am

    getting the proper back lash is a bitch... jay is correct in tellin ya to take it to some one who knows what they are doing...

  4. #4
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    Gainesville, VA
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    Take it to a shop. I wouldn't use a set of used gears either. You need to get a good installation kit with all the seals and bearings. It's not an easy job at all and if done wrong you it will cost you more in the long run.

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