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Rebuild 10 bolt or MWC 9"

This is a discussion on Rebuild 10 bolt or MWC 9" within the Drivetrain forums, part of the LSx Technical Help Section category; I've been racking my brain for over a year so I figured I'd get some outside input on my idea ...

  1. #1
    Big Gulps, huh? HOBS's Avatar
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    Rebuild 10 bolt or MWC 9"

    I've been racking my brain for over a year so I figured I'd get some outside input on my idea and see how stupid it is. Ok so here goes. First off my car will never see a drag strip it will likely never push more than 400 rwhp but it will have a 3600 stall eventually. Probably some Nitto Drs as well. Also worth noting I have enough $$ to do either option so let me know which option you think makes more sense for what I'm using the car for.

    Option A-Rebuild the stock 10 bolt with upgraded axles, diff, gears and girdle. Worst case costing me $1500. I then spend the left over money on sfc's, headers, k-member, strano springs and new shocks.

    Option B-Buy a brand spanking new MWC 9" fairly decked out. Roughly costing $3400. I have then spent most of the budget and will have to wait to probably another year to get the suspension parts.

    Ok now go ahead and or whatever your feeling.

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    You will eventually blow the upgraded 10 bolt.
    Go with the expensive option here.

  3. #3
    Big Gulps, huh? HOBS's Avatar
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    Even upgraded you don't think it will handle 400 hp? I read an article a while ago (which started me second guessing the MWC 9 option) it said they could supposedly take 425 hp all day long.

  4. #4
    Slow'er'Ass Mr. Luos's Avatar
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    Not if you are able to hook it up....
    10 bolt will eventually go

  5. #5
    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by HOBS View Post
    Even upgraded you don't think it will handle 400 hp? I read an article a while ago (which started me second guessing the MWC 9 option) it said they could supposedly take 425 hp all day long.

    well... my 10 bolt couldn't take a little over 400rwhp... i wouldn't bother to waste the money to beef up a weak link when it will just break again...



  6. #6
    Junior Member ReaperchildZ28's Avatar
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    MWC & try getting their suspension upgrades too they rock !

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    None Shall Pass Knight's Avatar
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    Buy the 9". If you upgrade the 10 bolt, you'd better save the extra money to keep repairing it. Especially if you throw DRs on it. Traction and a 10 bolt don't mix - even when it's upgraded. I tried with mine and ended up tearing three sets of gears apart before I gave up and put a 9" in.

  8. #8
    Big Gulps, huh? HOBS's Avatar
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    Alright that makes the decision easy then. Little disappointing that even upgraded they cant take that lil bit of hp. Stupid magazine aritcles giving me false hope lol. Thanks for all the helpful input guys. Hey Spaz what were you doin when you popped your rear. I assume from the pics your rear gear exploded?

  9. #9
    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by HOBS View Post
    Alright that makes the decision easy then. Little disappointing that even upgraded they cant take that lil bit of hp. Stupid magazine aritcles giving me false hope lol. Thanks for all the helpful input guys. Hey Spaz what were you doin when you popped your rear. I assume from the pics your rear gear exploded?
    i wasn't even getting on it when it finally went... i was just making a turn on to the road i work on and *boom* right in mid turn... my rear probably has about 100 or so passes down the 1/4... the posi unit snapped and a bolt broke off and went to town inside...

  10. #10
    Senior Member Z28_Driver's Avatar
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    Quote Originally Posted by Spaz View Post
    i wasn't even getting on it when it finally went... i was just making a turn on to the road i work on and *boom* right in mid turn... my rear probably has about 100 or so passes down the 1/4... the posi unit snapped and a bolt broke off and went to town inside...
    Do you have any pics of the inside after the damage?

  11. #11
    Moderator 35th-ANV-SS's Avatar
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    There are people with stock 10 bolts running in the 10's. Some are on here. It's not the norm though.

    These are stalled autos.

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    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by Z28_Driver View Post
    Do you have any pics of the inside after the damage?
    i'll see if i can dig them up...

  13. #13
    None Shall Pass Knight's Avatar
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    Quote Originally Posted by Spaz View Post
    i'll see if i can dig them up...
    I found one


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    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by Knight View Post
    I found one

    Click for full size


  15. #15
    Big Gulps, huh? HOBS's Avatar
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    Lol that sucks it went just puttering around. I think im gonna have a local place make the driveshaft. Approximately how much longer does it need to be over stock? Which posi unit are you guys running? I was thinking just the billet one or is the truetrac worth the extra coin?

  16. #16
    Moderator 35th-ANV-SS's Avatar
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    I have the TrueTrac. If you can swing the extra coin though, I would get the WaveTrac.

  17. #17
    Big Gulps, huh? HOBS's Avatar
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    I would if I could but the wavetrac would put me way over budget. Have you had any issues with your truetrac?

  18. #18
    Moderator 35th-ANV-SS's Avatar
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    Quote Originally Posted by HOBS View Post
    I would if I could but the wavetrac would put me way over budget. Have you had any issues with your truetrac?
    No I haven't, but I am at relatively stock power still. I've seen some people have some issues with them. Keeping my fingers crossed as I'll be FI in a month putting down 500+rwhp/tq

    The WaveTrac is about a $500 upgrade if ordered at the time of getting the 9" and comes with a lifetime warranty.

    If you get the TrueTrac and then decide later you want the Wavetrac, the cost is a lot more, as you not only have to replace the center section, but the axles as well. WaveTrac is 35 spline where-as the TrueTrac is 31 spline.

  19. #19
    None Shall Pass Knight's Avatar
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    I run the TrueTrac as well in the new 9". Ran one in the stock 10 bolt. Never had an issue with either one, and I'm around 450 hp/460 tq. Seems to hold up well until you start going north of 550 hp, or so I've heard.

  20. #20
    Big Gulps, huh? HOBS's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    No I haven't, but I am at relatively stock power still. I've seen some people have some issues with them. Keeping my fingers crossed as I'll be FI in a month putting down 500+rwhp/tq

    The WaveTrac is about a $500 upgrade if ordered at the time of getting the 9" and comes with a lifetime warranty.

    If you get the TrueTrac and then decide later you want the Wavetrac, the cost is a lot more, as you not only have to replace the center section, but the axles as well. WaveTrac is 35 spline where-as the TrueTrac is 31 spline.
    Its an $800 dollar upgrade through MWC. Upgrading later isn't gonna be terribly expensive if I need to. They just came out with a new 31 spline WaveTrac.

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