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Thread: Best 1/8 diffs?

          
   
   
  1. #1
    Avid BYT Member Kahlis's Avatar
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    Default Best 1/8 diffs?

    I'm gearing up to to buy the FLM hybrid bulks, but the recommended hotbodies diffs-n-pinions yield no results.

    For those not in the 'know', I'm building a 3905 Emaxx with the Gorillamaxx G4, MMM and the full 6S setup (5800mAh 3S 25c x2).

    So gear'd up w/ the hybrid bulks, who makes the strongest diffs?
    - Lee
    Ultimate Emaxx - CC 1520/1y 1600kv, MMM - 6S 65/130C 5.0 NanoTech - Gmaxx G4, G3.3 suspension - FLM hybrid bulks - RPM everything - UE goodies
    Stump-Puller Emaxx - Dual Titan 775, EVX-2 - 4S 30/40C 5.0 Turnigy - Gmaxx G2 - AcncM - RPM everything
    Faast Rustler - CC 1415/1y 2400kv, MMP - 4S 35/45C 3.0 Turnigy - FLM Trans - STRC 1.75" stretch, STRC components - RPM goodies
    Blackout Emaxx - Staying a factory beater - RPM everything (considering dual Velineon set up)

  2. #2
    Bronze Level BYT Member littleazn248's Avatar
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    Default Re: Best 1/8 diffs?

    Wait so you blew the Hotbodies diffs? If so probably some Mugen MBX-6t diffs

  3. #3
    BYT official flamer of noobs suicideneil's Avatar
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    Default Re: Best 1/8 diffs?

    UE do, but all they use are Ofna Hyper diffs basically- look on ebay etc for some 'ofna differentials'. Hotbodies are getting hard to find these days for some strange reason, but they are just as good. Just add in the needed bearings & some 8x10x0.2mm shims...

    However, because Im sofaking awesome, I found all the Hotbodies parts on Amain:

    http://www.amainhobbies.com/product_...htning-Stadium x2

    http://www.amainhobbies.com/product_...g-Buggy-Series x2

    http://www.amainhobbies.com/product_...g-Buggy-Series x2

    http://www.amainhobbies.com/product_...02mm-Washer-10 x1

    http://www.amainhobbies.com/product_...el-bearings-10

    You'll also need 4 of these:

    http://www.rc-monster.com/proddetail...d=RCMdiffshaft

    If you want to use the stock driveshafts or the traxxas cvds & drive cups ( or you can make your own by cutting the threaded part off of these: traxxas stub axles ).

    You'll also need these driveshaft coupler with 8mm bore ( v2 ) if you want to use the stock center driveshafts, or pickup a couple 8mm drive cups such as these with an 8mm bore.


    This is what they look like afterwards ( how-to guide ): click for diff p0rn.
    Last edited by suicideneil; 11-26-2010 at 11:39 AM. Reason: updated links 26 nov 2010

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  4. #4
    Avid BYT Member Kahlis's Avatar
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    Default Re: Best 1/8 diffs?

    Quote Originally Posted by littleazn248 View Post
    Wait so you blew the Hotbodies diffs? If so probably some Mugen MBX-6t diffs

    No,... Not at all. FLM's website recommends hotbodies diffs but I can't find them on hotbodies' website. I was asking who makes the best 1/18 diffs to put in the hybrid bulks.
    - Lee
    Ultimate Emaxx - CC 1520/1y 1600kv, MMM - 6S 65/130C 5.0 NanoTech - Gmaxx G4, G3.3 suspension - FLM hybrid bulks - RPM everything - UE goodies
    Stump-Puller Emaxx - Dual Titan 775, EVX-2 - 4S 30/40C 5.0 Turnigy - Gmaxx G2 - AcncM - RPM everything
    Faast Rustler - CC 1415/1y 2400kv, MMP - 4S 35/45C 3.0 Turnigy - FLM Trans - STRC 1.75" stretch, STRC components - RPM goodies
    Blackout Emaxx - Staying a factory beater - RPM everything (considering dual Velineon set up)

  5. #5
    Avid BYT Member Kahlis's Avatar
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    Default Re: Best 1/8 diffs?

    Yet again, thanks Neil. 'Nother question fer ya though,... Are aluminum cups worth their money or just stick with the unit as is?
    Last edited by Kahlis; 06-02-2010 at 05:23 PM.
    - Lee
    Ultimate Emaxx - CC 1520/1y 1600kv, MMM - 6S 65/130C 5.0 NanoTech - Gmaxx G4, G3.3 suspension - FLM hybrid bulks - RPM everything - UE goodies
    Stump-Puller Emaxx - Dual Titan 775, EVX-2 - 4S 30/40C 5.0 Turnigy - Gmaxx G2 - AcncM - RPM everything
    Faast Rustler - CC 1415/1y 2400kv, MMP - 4S 35/45C 3.0 Turnigy - FLM Trans - STRC 1.75" stretch, STRC components - RPM goodies
    Blackout Emaxx - Staying a factory beater - RPM everything (considering dual Velineon set up)

  6. #6
    BYT official flamer of noobs suicideneil's Avatar
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    Default Re: Best 1/8 diffs?

    Alloy cups.... nah, I've only ever seen 2 ( stock plastic ) that have been damaged by excessive power, you'll snap the drive pins & shatter the spiders before you mangle the stockcup 99% of the time, and even thats fairly rare too

    As for pictures of the outputs, its all in my thread- easier to work through the pictures so you see where they go & how to fit them- same principle as the hybrids, the diff cases are just built into the bulks obviously:

    http://www.rc-monster.com/forum/show...?t=8012&page=2

    Specifically though- you get this when you buy the diffs:



    and it ends up looking like this when its done:



    Once its all put together those outputs will be sticking out eiter side of the bulkhead assembly, ready to accept your drive cups or driveshafts

    In the event this site is down, go here instead: https://suicideneil.wordpress.com
    Flaming noobs since June '06

  7. #7
    Avid BYT Member Kahlis's Avatar
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    Default Re: Best 1/8 diffs?

    Side note,... it would appear that most every idea I come up with Neil seems to have already done this years ago. What gives????
    - Lee
    Ultimate Emaxx - CC 1520/1y 1600kv, MMM - 6S 65/130C 5.0 NanoTech - Gmaxx G4, G3.3 suspension - FLM hybrid bulks - RPM everything - UE goodies
    Stump-Puller Emaxx - Dual Titan 775, EVX-2 - 4S 30/40C 5.0 Turnigy - Gmaxx G2 - AcncM - RPM everything
    Faast Rustler - CC 1415/1y 2400kv, MMP - 4S 35/45C 3.0 Turnigy - FLM Trans - STRC 1.75" stretch, STRC components - RPM goodies
    Blackout Emaxx - Staying a factory beater - RPM everything (considering dual Velineon set up)

  8. #8
    BYT official flamer of noobs suicideneil's Avatar
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    Default Re: Best 1/8 diffs?

    Im old skool

    There arent many parts of mods I havent tried or currently have fitted- the RC-Monster centerdiff drive unit is the only great venture I havent embarked upon yet really, mainly because having a tranny makes ( fine ) gearing adjustments much easier; maybe one day. Also gotta realise the emaxx had been out for nearly 10 years, so pretty much every avenue of modding or upgrading has been explored by someone, somewhere...

    In the event this site is down, go here instead: https://suicideneil.wordpress.com
    Flaming noobs since June '06

  9. #9
    Avid BYT Member Kahlis's Avatar
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    Default Re: Best 1/8 diffs?

    Quote Originally Posted by suicideneil View Post
    Im old skool

    There arent many parts of mods I havent tried or currently have fitted- the RC-Monster centerdiff drive unit is the only great venture I havent embarked upon yet really, mainly because having a tranny makes ( fine ) gearing adjustments much easier; maybe one day. Also gotta realise the emaxx had been out for nearly 10 years, so pretty much every avenue of modding or upgrading has been explored by someone, somewhere...

    Fair enough. Perhaps though, I can find a RC website that doesn't know Neil, Nick or Mike and I can claim some glory,....
    - Lee
    Ultimate Emaxx - CC 1520/1y 1600kv, MMM - 6S 65/130C 5.0 NanoTech - Gmaxx G4, G3.3 suspension - FLM hybrid bulks - RPM everything - UE goodies
    Stump-Puller Emaxx - Dual Titan 775, EVX-2 - 4S 30/40C 5.0 Turnigy - Gmaxx G2 - AcncM - RPM everything
    Faast Rustler - CC 1415/1y 2400kv, MMP - 4S 35/45C 3.0 Turnigy - FLM Trans - STRC 1.75" stretch, STRC components - RPM goodies
    Blackout Emaxx - Staying a factory beater - RPM everything (considering dual Velineon set up)

  10. #10
    Bronze Level BYT Member littleazn248's Avatar
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    Default Re: Best 1/8 diffs?

    Just curious but Suicideneil why not the spiral cut truggy diffs? How hard could it be to find the diffs their the same diffs as the one in the lightning, d8t/d8, Vorza, and VE8 they all use those diffs

  11. #11
    BYT official flamer of noobs suicideneil's Avatar
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    Default Re: Best 1/8 diffs?

    1) They wont fit the FLM hybrids as they are slightly larger diameter ( ring gear )
    2) They are a much lower ratio, you'd have trouble gearing up enough to compensate- ideal for use with a centerdiff unit, but not with a tranny.
    3) The pinion gear/shaft places alot of side-load on the inner bearing with the spiral cut gears, and it frequently fails if you put too much power through the truck.

    With the buggy diffs, you only have to use a pinion with one extra tooth to compensate for the slightly lower ratio vs stock diffs.

    In the event this site is down, go here instead: https://suicideneil.wordpress.com
    Flaming noobs since June '06

  12. #12
    Avid BYT Member Kahlis's Avatar
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    Default Re: Best 1/8 diffs?

    Outstanding!

    I just placed my order for the lightning series 1/8 diffs, bevel gear, bearings, washers and this - neat.

    Now I just gotta wait a bit to buy the FLM hybrid bulks, then a little bit longer for the MMM system,... I'm well on my way for a unbreakable land-based rocket!! Oh wait,... I still need,... a couple more things,...
    - Lee
    Ultimate Emaxx - CC 1520/1y 1600kv, MMM - 6S 65/130C 5.0 NanoTech - Gmaxx G4, G3.3 suspension - FLM hybrid bulks - RPM everything - UE goodies
    Stump-Puller Emaxx - Dual Titan 775, EVX-2 - 4S 30/40C 5.0 Turnigy - Gmaxx G2 - AcncM - RPM everything
    Faast Rustler - CC 1415/1y 2400kv, MMP - 4S 35/45C 3.0 Turnigy - FLM Trans - STRC 1.75" stretch, STRC components - RPM goodies
    Blackout Emaxx - Staying a factory beater - RPM everything (considering dual Velineon set up)

  13. #13
    New BYT Member Daleyb93's Avatar
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    Default Re: Best 1/8 diffs?

    Sorry i'm digging around a bit and i have asked so many people this.
    Neil, the HB diffs there, what is the pinion gear like? (maybe you call it bevel but the smaller of the two which is driven by shafts)
    Every website i look at has it without a hole drilled through it so how would e maxx users put the screw through that? Lol
    Thanks guys!

  14. #14
    BYT official flamer of noobs suicideneil's Avatar
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    Default Re: Best 1/8 diffs?

    You have to use a different drive cup with an 8mm bore, its held in place by one or two set screws on either side ( there are flats ground onto the shaft )- read post #3 again, all the info and links you need are there

    In the event this site is down, go here instead: https://suicideneil.wordpress.com
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  15. #15
    New BYT Member Daleyb93's Avatar
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    Default Re: Best 1/8 diffs?

    OK i'm so sorry but no matter how many times it's said it isnt sinking in :'(
    My stock outdrive sliders work with the RC-M part >>> http://www.rc-monster.com/proddetail...d=RCMdiffshaft
    but for the centre driveshaft i have the traxxas metal CVDs so i buy on of these >>> http://www.rc-monster.com/proddetail...RCM8mmdrivecup
    and then pull apart the traxxas cvd and insert the dogbone end into that bit?
    THANKS SO MUCH!!!!!!!!!

  16. #16
    New BYT Member Daleyb93's Avatar
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    Default Re: Best 1/8 diffs?

    OK i have another way to go :/
    i could just buy the UE 6 Spyder designs cause they cost less and way less hassle BUT i then still have the problem of Golden Horizons bulkheads which are cool but FLM ones would be sweet.
    FYI i earn like 8 pounds a week... so money is hard to find... But christmas is coming
    what you think? HB or UE?

  17. #17
    BYT official flamer of noobs suicideneil's Avatar
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    Default Re: Best 1/8 diffs?

    Quote Originally Posted by Daleyb93 View Post
    OK i'm so sorry but no matter how many times it's said it isnt sinking in :'(
    My stock outdrive sliders work with the RC-M part >>> http://www.rc-monster.com/proddetail...d=RCMdiffshaft
    but for the centre driveshaft i have the traxxas metal CVDs so i buy on of these >>> http://www.rc-monster.com/proddetail...RCM8mmdrivecup
    and then pull apart the traxxas cvd and insert the dogbone end into that bit?
    THANKS SO MUCH!!!!!!!!!
    Yep, thats correct.

    You could just buy the complete UE diffs from ebay for $199 ( some on there currently as it happens.. ), but you may still need to change the output shafts on either side to the rc-monster items depending on what driveshafts you plan to use ( cups may be too short for traxxas cvds ).

    The UE diffs themselves are just ofna spider diffs- metal cup which is stonger than the HB plastic one, but its rare that you would strip or damage either. Comes down to price & availability more than anything really...

    In the event this site is down, go here instead: https://suicideneil.wordpress.com
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  18. #18
    New BYT Member Daleyb93's Avatar
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    Default Re: Best 1/8 diffs?

    Thanks Neil,
    ok I have a new plan!
    using these Ofna diffs >>> http://www.unlimitedengineering.com/...ore/13542.html
    I assume i can stuff them into the FLM hybrids >>> http://www.fastlanemachine.net/prodd...LM18700&cat=15
    and then do the old swappy of the shafts and run standard cvds
    Is there any news that this works? cause I can't really afford it not to.
    thanks!

  19. #19
    BYT official flamer of noobs suicideneil's Avatar
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    Default Re: Best 1/8 diffs?

    UE dont sell outside of the USA so you will have to source them elsewhere ( you are a UK resident right? ), but ebay is a great source of cheap ofna diffs for sure. They should fit the FLM hybrids just fine- just need a few shims and tweak the mesh as required.

    In the event this site is down, go here instead: https://suicideneil.wordpress.com
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  20. #20
    New BYT Member Daleyb93's Avatar
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    Default Re: Best 1/8 diffs?

    Nup i'm Aussie, i actually sent UE a message and they replied saying that some people said their diffs don't fit well in the FLM hybrids.
    why can't someone produce a simple setup :/
    I think I will just get them hot bodies ones, they look kinda like they will stop making them though, so if somehow i break some will they be hard to find new?

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