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  1. #1
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    Qc_maxx showing off (Lst2 diffs in an E-Maxx) Now with CC1717 in my modded 3906

    With the agreement of “IT’S Me“ from RCM I post my step by step process to make this mod.

    1: It will be cheaper if you have already:
    - Center dog bone.
    - 4 old and unused drive shafts. (replace 1/8 diff output shaft )

    2: It cost me (include shipping cost to Canada):

    - 2 x LST 2 diff = $43 us ( 43/13)
    - 4 x 1/8 diff output shaft + 2 x Drive cup - 8mm bore for 1/8 diff = $50 us
    - 1 Dog Bone center kit from Kershaw = $ 55
    - Bow ˝ pvc (Fem to Fem) + 1” join = $0.50

    First, I cleaned the diffs and put Gorilla Swat in it and change the 4 diffs output.


    When I put them back together and tighten the ring to the cup, it was impossible to turn the diff by hands.



    I noticed that the RC monster output was a little bit too long so I had to shave them to the appropriate length. Once shaved the diffs output, it worked perfectly!!



  2. #2
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    Next, plastic trimming can get started. It’s better to do it slowly to not take too much material at a time. I used this dremel bit to do all the work.


    I hope the pictures talk by themselves.
    A lot of small adjustments is needed to achieve a perfect fit.









  3. #3
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    Then I had to shave the drive shafts a little bit too. After that, it was A LOT easier to install the pins.



    f
    inished with RCM 8mm Drive cup - Kershaw dog bone



    I have a Ofne 51t mod1 spur 20t pinion with Bidpruduct 36/74 8xl 2075KV
    Motor with 43/13 diff ratio,

    Differential Ratio: 3.3076923076923075
    Transmission Ratio: 1.7222222222222223
    Other Ratio: 1
    Spur Tooth Count: 51
    Pinion Tooth Count: 20
    Total Voltage: 14.8
    Motor KV: 2083
    Tire Diameter (inches): 5.8
    Tire Ballooning (inches): 0
    Motor Current Draw: 83
    Motor coil Ω: 0.0084
    Spur/Pinion Ratio: 2.55 : 1
    Total Ratio: 14.52628 : 1
    Tire Circumference (inches): 18.22 inches (462.82 mm)
    Total Motor Speed: 29376.13 RPM
    Vehicle Speed: 34.89 mph (56.05 km/h)
    Effective KV Value: 1984.87
    KT constant: 0.65 oz-in/A
    Motor Torque: 0.28 ft-lbs
    Final Torque: 4.08 ft-lbs
    Final Power: 1228.4 watts (1.6 HP)


    ps: I'm french speaking so my english is not perfect.

  4. #4
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    Salut mon amis! Ca c'est un bon modification! Tres bien! Mon francais est tres mal, l'escuse.

    I gotta tell a few yocal locals about that!
    Am I done yet? The wife keeps telling me yes!

  5. #5
    RC Turnbuckle Jr.
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    Instead of using PVC pipe you can use copper or brass tubes of the right size and thickness.

  6. #6
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    I like creative people
    Why do you prefer LST diff ?

  7. #7
    RC Turnbuckle Jr.
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    Excellent. Do you have a part number for that dremel bit?
    E-Maxx Neu1515 1y/MGM 5s

  8. #8
    Marshal carraig042's Avatar
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    Quote Originally Posted by Popoxx
    I like creative people
    Why do you prefer LST diff ?
    Looks great! Nice mod.

    Probably because it has 4 spyder gears making it stronger than the stock set-up.

    -Brett
    4wd Sportmaxx 3.3
    E-Revo - Mamba Monster - Neu 4s

  9. #9
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    Don't worry, your pictures speak volumes, and your English is better than many people who's first (or probably only) language is English. Even though I saw your tag was E-MAXX Quebec, I didn't realize that your primary language was French and that you didn't think your English is perfect until I saw what you wrote at the bottom of your post. I like it, I applaud your creativity. Its a very nice job. The only thing I would be concerned about it the PVC, I am not sure if it will hold up, but it probably will. Just check it every so often for damage. Are those diffs sealed?

  10. #10
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    Why do you prefer LST diff ?
    Because in LST-2 diffs , these things are almost indestructible
    the lst/aftershock/muggy diffs are very similar to std 1/8 scale diffs, 6 gear spiders and you can get TiN coated gears for the lst 43/13 ration, an alu casing.

    Instead of using PVC pipe you can use copper or brass tubes of the right size and thickness
    I tried and only find too thick one so end up with pvc.The gray one should take care of any play. I make them very tight fit. I also tried to dremel the wite one a little taper so it won't pop off.

    Are those diffs sealed?
    Yes they are.

    Quote Originally Posted by mkrusedc
    Excellent. Do you have a part number for that dremel bit?
    No but found a set : Twist burs
    Last edited by cooleocool; 03-06-2009 at 07:52 AM. Reason: merge

  11. #11
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    all the parts used are lst2 right? except the plastic rings
    auto 5, great guy to deal with

  12. #12
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    all the parts used are lst2 right? except the plastic rings
    NO, You'll need

    4 x 1/8 diff output shaft
    + 2 x Drive cup - 8mm bore for 1/8 diff

  13. #13
    RC Turnbuckle Jr.
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    Quote Originally Posted by EMaxx_Quebec
    NO, You'll need

    4 x 1/8 diff output shaft
    + 2 x Drive cup - 8mm bore for 1/8 diff
    http://www.rc-monster.com/proddetail...RCM8mmdrivecup
    http://www.rc-monster.com/proddetail...d=RCMdiffshaft

  14. #14
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    Small update!!

    I got a medusa 3670 2000 few weeks ago and all I can say is :
    That's the best mod I did. And I'm sure that it worth every $ it cost.
    It hold awsome without ANY prob!!! ( no comparaison with stock item T-E)
    They had gone trought a lot of 4s *********x 5000 30c cycles.( average of 45min of bashing, jumping)
    If you have the time, and are tired of rebuilt diff, THIS IS A MUST!!!!!

  15. #15
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    New update!!!

    I recently bought a Monoblock extention ( tired to break Trx weelybar).
    And now I can use the stock LST2 CVD that come with the diff. ( right lengh!)
    I have a spare 8mm cup and 1 dogbone now.
    I'll post pics tomorrow.

  16. #16
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  17. #17
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    That looks great
    Morten SnoopMaxx
    3906 ROCKSTAR Makita
    c",)

  18. #18
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    That is an awesome truck. I'm not a fan of electrics, I appreciate the performance they can have but it isn't my thing. But I love the MAXX family, and that is why I have taken an interest in this build. You really did a nice job. Those are T-MAXX bulkheads, right (I know they are aftermarket)? The reason I ask is that I remember someone had a similar idea to what you have done, where they took Losi (I forget exactly what vehicle they came from) bulkheads and did some modification to get the Losi bulks fit the T-MAXX. With the kind of power you have, a Monoblock is a good idea. It looks like you have that expensive chunk of metal well protected with those RPM wearplates. They really work well. My set take hits that my stock skidplates would otherwise take, and I would be replacing them quite often. The wearplates get all kinds of scrapes and gouges, I just take a knife and hand file and clean them up so they can easily make their way over the next obstacle . I never noticed how well though-out the Monoblock's design was, look at how the lower leading edge of the Monoblock matches the angle of the chassis brace!
    Last edited by Petox20; 07-27-2009 at 10:46 PM.

  19. #19
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    Thanks man.
    Those bulkhead are Great Assembly 7075 t6 with braces.
    Also have UE khead + RCT8 rear shocks all around + rear Ti skid ( I can't install my front one cuz I want to keep my RPM front bumper at the moment.

  20. #20
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    I need part numbers for the diffs.
    E-Revo MMM 6s
    RC18T 8000kv 3s

  21. #21
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    I don't have the part number dut there is one here
    3906 CC 1717 / MMM GA 7075 UE Khead LST2 DIFF

  22. #22
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    My maxx got a small upgrade










    3906 CC 1717 / MMM GA 7075 UE Khead LST2 DIFF

  23. #23
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    3906 CC 1717 / MMM GA 7075 UE Khead LST2 DIFF

  24. #24
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    That is a great lookin truck!!!
    BLEmaxx-3905
    Fam. last words-Hey yall watch this!

  25. #25
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    Hello every one!!
    I want to introduce my Quebec maxx.
    Part list:

    • flm chassis (flm 10800) for a 3906
    • GARC bulk 7075 t6 with brace.
    • Ue Monoblock extension
    • Ue 8mm cup
    • Ue 138mm dogbone
    • Kersha dogbone center
    • Medusa 70mm 2000kv
    • Ue khead shock tower
    • DDwing mount
    • Losi 8ight buggy 2.0 wing mount
    • Custom wing
    • Lst-2 custom fit diffs. ( awesome mod btw)
    • 4 AE RCT8 rear shocks with UE spring set and 50 weight oil all around
    • CC MMMv3 ( after 2 v1 burned)
    • 17mm hub
    • Badlands mount on Rulux half-up on the inner bead
    • RPM Skid and bumper
    • RPM A-Arms
    • Custom lexan complete center skid that fit FLM chassis.



    It was suppose to be budget friendly but ended-up with a good amount of $ in that beast
    3906 CC 1717 / MMM GA 7075 UE Khead LST2 DIFF

  26. #26
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    Nice Maxx! Great job on the write up for the upgrade. Very well done.
    Authorization Not Required.

  27. #27
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    Good job ! I like uncommon builds
    How do you like your shocks ? Maybe I will buy new ones for my E-Maxx so I need feedbacks.
    Could you give me a link on Tower Hobbies for these shocks please ? Thanks

  28. #28
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    How do you like your shocks ?
    I really like them but the rear one ( the one I have)
    are in the long side.
    They have to compress a liiitle to be mount!
    They make a groove in the RPM arm with the littli pin on the diff side.
    And the ( UE set) are barely long enough to reach the retainer. But with a shim, it work awsom.

    Could you give me a link on Tower Hobbies for these shocks please
    AE RC8
    But I got them for $20 on ebay


    Good job ! I like uncommon builds
    Thanks
    3906 CC 1717 / MMM GA 7075 UE Khead LST2 DIFF

  29. #29
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    They make a groove in the RPM arm with the littli pin on the diff side.
    I mean the dirveshaft made that groove!
    3906 CC 1717 / MMM GA 7075 UE Khead LST2 DIFF

  30. #30
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    But if you keep using these shocks I guess this groove isn't a problem ? I don't need to change the driveshafts ?

  31. #31
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    I guess this groove isn't a problem
    Absolutly not.

    I don't need to change the driveshafts ?
    No
    3906 CC 1717 / MMM GA 7075 UE Khead LST2 DIFF

  32. #32
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    Ok thanks !

  33. #33
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    The only thing is when the weel doesn't touch the ground, they don't turn very freely.(free spin is not has it use to)

    C'est pas un gros prob pour moi!!
    Un petit mocreau de plastique a l'intérieur du piston devrait limité l'étirement sans limité la compression.
    3906 CC 1717 / MMM GA 7075 UE Khead LST2 DIFF

  34. #34
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    thats pretty sweet setup, i was thinkin of using muggy diffs in a truck the gear ratio is lower by almost one revolution. like 4.09:1
    TEST YER MIGHT!

  35. #35
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    Thanks

    The diff ratio I have is 43/13 ( LST)but I run 51t mod 1 ofna spur with a 20t pinion.
    You have to be careful to not chose 45/11 ( Muggy )

    And now I have a bullet proof trans for any BL system

    Few weeks ago I was able to put my hand on this!!!!!
    New Ultramaxxed gear set and idlers
    IMG]http://i265.photobucket.com/albums/ii216/Emaxx_Quebec/DSCF0003-2.jpg[/IMG]

    Last edited by EMaxx_Quebec; 02-06-2010 at 02:54 PM.
    3906 CC 1717 / MMM GA 7075 UE Khead LST2 DIFF

  36. #36
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    Second try at painting!!

    Here is my new prama exciter for revo!
    I used liquid mask and even if it's not perfect, it came out good I thing.





    3906 CC 1717 / MMM GA 7075 UE Khead LST2 DIFF

  37. #37
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    Usually I don't like very much the multicolored MTs, but yours looks great, nice color harmony and nice body, good job

    What's the next step ? To run it maybe ?

  38. #38
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    Thanks Popox

    It's winter time here and I can't ride it since it's absolutly not waterproof.
    3906 CC 1717 / MMM GA 7075 UE Khead LST2 DIFF

  39. #39
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    Same frustration here...

  40. #40
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    never mind spending time and money on RC, your mrs is prgnant, whats the mother in law going to say! lol
    Slash VXL, E- Maxx 2 , comin' through!

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