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  1. #1
    RC Racer
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    RC- Monster Universal Center Diff/Motor Mount

    Sitting and trying to mount my rc diff, do not know what I'm doing wrong but will not match it as it should.
    Get a small gap, look at the picture and you will understand.
    What's wrong?


  2. #2
    RC Turnbuckle Jr. ReglarGuy's Avatar
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    You got me my the norgles...what's the advantage of using it as apposed to a factory setup?
    The ReglarGuy is kid tested and father approved.

  3. #3
    RC Qualifier
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    Much better control, tunability, And it's unique!

    Op, sorry I don't know why that gap is there; I thought all center diffs fit perfectly in there. Are you sure everything's sitting straight?

    If the whole assemmmbly (mount and diff) will line up with the bolt holes in the chassis, then just add shins to fill in that gap.

  4. #4
    RC Racer
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    I looked at the rock-rod building, his does not look like mine.
    Maybe I got the wrong stuff.
    Is there anyone who knows you are welcome to help me.

  5. #5
    RC Qualifier ausprime's Avatar
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    Not all diffs are the same width.
    You will need to find a smaller diff.
    The diff you have would work in the V1 RCM CD mount. But not the V2 mount that you have.
    The hyper 7 CD should work. But i would ask Mike at RCM what diffs will fit.
    My RC Cycle:
    Build it, Drive it, Brake it.

  6. #6
    RC Racer
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    I have a Ofna hyper 7TQ and a HPI Vorza HP diff.

    Last edited by painter; 10-17-2015 at 09:03 AM.

  7. #7
    RC Competitor
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    From the photo, it looks like the bearings are not fully seated. Perhaps thinner bearings.
    Proud member of the red card club.

  8. #8
    RC Racer
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    Talked to Mike, he said the same thing. Little thinner bearings or deeper bushings.

  9. #9
    RC Champion
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    I used a hyper 9 ss center diff and it fit fine, albeit at the maximum width adjustment. I am going to install a 50t vorza flux cd tomorrow so that I can get a little more room for the 1717 motor can.
    I have an RC problem...

  10. #10
    RC Qualifier
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    RC- Monster Universal Center Diff/Motor Mount

    Maybe look for some 8x16x4mm bearings, instead of the usual 8x16x5mm

  11. #11
    RC Racer
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    Quote Originally Posted by rock-rod View Post
    I used a hyper 9 ss center diff and it fit fine, albeit at the maximum width adjustment. I am going to install a 50t vorza flux cd tomorrow so that I can get a little more room for the 1717 motor can.
    I have a different version than you, that I have to be new version.
    I can not have greater spuer gear than 46t it takes in my centerskid plate. You can add a spacer plate to get it up. Is there no one else who has a similar I have?
    Would be fun to see how you solved this.

  12. #12
    RC Champion
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    46t is the maximum diameter mine can do as well without mods. I plan to route a slot in the plate to allow clearance for the larger gear with a dremel just like the 1/8 scale buggies/truggies have. I hope to have some free time do work on it today.
    I have an RC problem...

  13. #13
    RC Turnbuckle Jr. Jezza's Avatar
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    In that case why not change to mod 1 gearing or are you already using mod1 gears.
    Live life to the fullest

  14. #14
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    It's already mod 1

  15. #15
    RC Turnbuckle Jr. Jezza's Avatar
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    Quote Originally Posted by Emaxx Racer View Post
    It's already mod 1
    Wow so something bigger then 46, I guess with the 1717 you can really go taller then that....

    What pinion size are you guys going to use?
    Last edited by Jezza; 10-18-2015 at 09:28 AM.
    Live life to the fullest

  16. #16
    RC Qualifier ausprime's Avatar
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    Maybe you could remove the bushings and get bigger bearings. 8x19x5mm and 10x19x5mm
    But I still think that you might be able to find a smaller diff. Maybe a Losi or AE diff will fit.
    My RC Cycle:
    Build it, Drive it, Brake it.

  17. #17
    RC Racer
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    I waiting for Mike to send deeper bushings.

  18. #18
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    I was able to fit the 50t spur but it just barely fits the opening in the chassis plate. I ended up using spacers on the mounting feet for the gear to clear the skid plate.
    I have an RC problem...

  19. #19
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    did you get the new bushings from mike?

    I went back and removed the bushings and instead used a dremel bit to create a channel in the skid plate for the larger spur gear to fit. I didn't like the bushings because they are very difficult to position and get the screws started.
    I have an RC problem...

  20. #20
    RC Racer
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    I live in Sweden so perhaps within two or three weeks before they come.

  21. #21
    RC Racer
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    Then I got (buy) new insert for the diff.
    The old was 4mm deep, and now I got 5mm deep.
    Everything fits perfectly, put in a Vorza HP 48t centerdiff and got in a 17t pinion. Put a few washers that it would not go in the center skid. Hope they stick together now.

  22. #22
    RC Champion
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    you should be good to go. You could use a dremel and make some clearance for the spur gear to fit without the washers. I did this with my plate so that a 50t spur will fit if needed.
    I have an RC problem...

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