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  1. #1
    RC poster
    Join Date
    Nov 2014
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    1

    E-Maxx Tranny on 3.3 T-maxx but keeping it Nitro

    With the many adapters out there for people converting T-Maxx's to brushless, I was wondering if it was possible to use a E-Maxx transmission on a 3.3 T-maxx but still using the Nitro engine. I have a few E-Maxx transmissions but I don't have any spare 3.3 transmissions lying around. I think the biggest issue is the internal ratio of the E-maxx vs. T-maxx transmissions. I have tried finding it for both and I am tired of looking. Had anyone ever attempted this?

  2. #2
    RC Turnbuckle Jr. Wildman4910's Avatar
    Join Date
    Jun 2009
    Location
    Cocoa Florida
    Posts
    4,909
    Count the number of teeth on both gears and divide, that will give you the ratio.

    As for using it on the maxx with a 3.3, depends on the ratio, if it's too tall it will struggle to pull it, if its too low it will spin up very fast with little speed.

    BL motors spin a heap faster then a Nitro engine does.

    Traxxas T-Maxx 1st Gear (Std) - 3.31:1
    Traxxas T-Maxx 2nd Gear (Std) - 2.29:1(narrow-2.50:1/wide-2.11:1)

    Traxxas E-Max BL trans ratio - 1.83:1

    That and you have to take into account the spur gear is located differently on the BL trany then the Nitro trany.

    Ebay has entire trany's for the cheapest prices around.
    Look out for the tree/crunch!

    LiPo? Naw NITRO!!

  3. #3
    RC Competitor
    Join Date
    Jan 2016
    Posts
    53
    You might be better off selling the emaxx transmission then buy a t-maxx transmission with the money. The tmaxx transmissions are different anyways, they have kind of a clutch inside and won't move the wheels until the engine spins up to a certain RPM. It might work but I'd just go with the 2 speed t-maxx transmission and call it a day.
    X-Maxx/TRX4/Rustler/Stampede

  4. #4
    Marshal Double G's Avatar
    Join Date
    May 2008
    Posts
    13,970
    The older T-Maxx transmissions have a clutch inside that does that. The newer ones do not.
    The Super Derecho

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