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Need help quick!

This is a discussion on Need help quick! within the Drivetrain forums, part of the LSx Technical Help Section category; My 10 bolt has finally bit it and instead of rebuilding it I want to upgrade to a 12 bolt, ...

  1. #1
    Member DemonSpeed's Avatar
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    Need help quick!

    My 10 bolt has finally bit it and instead of rebuilding it I want to upgrade to a 12 bolt, problem is I have no idea what I need. I drive it everyday so not a full race setup or anything. Any help is GREATLY appreciated. Thanks guys.
    LS6 Engine swap, Custom Predator Tune, Lid, SLP Cold Air, Ram Air H.O. Hood, Hooker Long Tubes, !Cats, 3" True Duals w/Dynomax Bullets, Performabuilt stage 2 w/3600 stall, B&M Trans. Cooler, Moser 12 Bolt w/ 3.73's

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  2. #2
    Member ultra_badass's Avatar
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    navy blue matallic
    2000 WS6 trans am M6

    IMO i would go with a ford 9...4.11...and a detroit locker with 35 spline axels...with your being a DD it wont be too bad on gas some people dont even see a change...

  3. #3
    Member DemonSpeed's Avatar
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    I have an automatic so ill prob. stay with 3.73's, what are the differences is a ford 9 and a moser 12 bolt? thanks

  4. #4
    Member ultra_badass's Avatar
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    navy blue matallic
    2000 WS6 trans am M6

    see if this helps ya http://www.chevyhiperformance.com/te...nd_comparison/
    id go with 3.90's buts that me

  5. #5
    Veteran 0rion's Avatar
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    do you have plans for big mods? If it's your DD and you're not planning on tracking it a whole bunch a 12 bolt will be fine. If you go to the track much a 9" or s60 might be the better way to go. Depending on what brand and who you get it through you may have to have your brake backing plates taken off your old rear and pressed into the new one. I went with a Strange and the place I got mine ( no longer selling rears) had a complete package that came with the backing plates already pressed. The reason I went with strange was because after the backing plates were pressed in it was a direct bolt in, even came filled with fluid. The other reason is the torque arm mount. The moser's have had problems with the torque arm bolts backing out because they use 4 small bolts instead of the 2 long pass through bolts that strange uses and also came OEM. IMO with limited mods and an auto a 12bolt would be fine. That's just opinion though.

  6. #6
    Member DemonSpeed's Avatar
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    is there any other benefit to a 12 bolt or 9 inch other than strength? just wondering if Im going to notice anything different. Thanks for the help guys, last thing, should I get 33 spline or would 30 be fine? might take it to the track a little, maybe turbo in the future (distant) as well. Thanks again.

  7. #7
    car enthusiast djvaly's Avatar
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    12 bolt or Moser 9'' if you plan on putting turbo on it and track it a bit too.
    so order a complete set with new 3:73 gears and Moser 9'' rearend is a better choice in strength.

  8. #8
    Member DemonSpeed's Avatar
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    one more question, what about abs and traction control? since its a DD should I get abs? is that something that can be pulled off my old rearend?

  9. #9
    2 SS's are better than 1 Jays00ss's Avatar
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    Quote Originally Posted by ultra_badass View Post
    IMO i would go with a ford 9...4.11...and a detroit locker with 35 spline axels...with your being a DD it wont be too bad on gas some people dont even see a change...
    Thats what I would do Better yet get 4.30's like mine
    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

  10. #10
    Member DemonSpeed's Avatar
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    Jays00SS, Do you ever drive on the interstate? i dont want to lose much more top end, whats it like? I always thought you really shouldnt go more than 3.73 with an automatic.
    Last edited by DemonSpeed; 10-29-2007 at 01:36 PM.

  11. #11
    Member DemonSpeed's Avatar
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    So while im at it, do you think I should go ahead and go 3.90's instead of putting 3.73's back in? Keep in mind I do interstate driving.

  12. #12
    Member ultra_badass's Avatar
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    navy blue matallic
    2000 WS6 trans am M6

    i would you might as well b.c if you dont like the way 3.73 feel and go with 3.90's its going to cost you more in the long run..if your worried about gas it wont be all that bad

  13. #13
    Member DemonSpeed's Avatar
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    how much more would this shave off my topend?

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