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  1. #1
    RC Racer
    Join Date
    Sep 2012
    Posts
    238

    How do I tell which tranny I have?

    I want to add the center diff and rear brake kit's. Traxxas says gearbox 5391x needed. How do I tell which one I have. Bought this used, it was a 2.5.

  2. #2
    Marshal Double G's Avatar
    Join Date
    May 2008
    Posts
    13,648
    The rear half of the gear box has the molds to attach the screws for the brake kit.
    The Super Derecho

  3. #3
    RC Racer
    Join Date
    Oct 2012
    Location
    north east iowa
    Posts
    148
    Part # 5391x is the gearbox that accepts a rear brake and part # 5391 (without the "x") is the gearbox that cannot use a rear brake, but best to look at yours and see to make sure. 2.5 revo didn't have a rear brake provision unless someone swapped transmissions in yours...
    If it ain't broke, fix it till it is! BB Revo

  4. #4
    RC Turnbuckle Jr. fallonguy's Avatar
    Join Date
    May 2006
    Location
    Dayton Nv.
    Posts
    3,182
    Do you have the 3.3 chassis? You can't put the rear brake on with the 2.5 chassis without moding the chassis.
    I wanted to put a really cool signature but I ran

  5. #5
    RC Racer
    Join Date
    Sep 2012
    Posts
    238
    I have the 3.3 chassis. Guess I'll look for a newer tranny

    Sent from my DROID RAZR using Tapatalk 2
    USAF, Retired
    ERBE, Dewalt EMaxx, Rustler VXL

  6. #6
    RC Turnbuckle Jr. fallonguy's Avatar
    Join Date
    May 2006
    Location
    Dayton Nv.
    Posts
    3,182
    You don't need to buy the whole transmission only the case they're around 7 to 10 dollars. look on ebay you can find them all the time also the transmission case for the slayer is the same as the revo too.
    I wanted to put a really cool signature but I ran

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