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  1. #1
    RC Enthusiast
    Join Date
    Aug 2012

    Hitec Servo Problem

    I have a Hitec Ultra Torque servo from like 3 years ago and I just Installed it into my 3905 and the servo horn dosent grip on to the gear. I thought the horn was stripped so I bought a new one and it turns out the horn is slightly to big for it. I've tried hot gluing it on but it didn't work. What should I do?

  2. #2
    Traxxas Marshal
    Join Date
    Mar 2003
    Wherever the road takes me.
    Are you using a servo horn designed for a Hitec servo? If not, that could be your problem. The Traxxas servo horn (same as Futaba) will not work with a Hitec servo; they have a different number of splines on the servo output shaft.
    "Happiness depends upon ourselves." -Aristotle

  3. #3
    Marshal ksb51rl's Avatar
    Join Date
    Nov 2006
    Northern NJ
    Hope this helps:

    23 Tooth
    * Airtronics: 23T
    * JR: 23T
    * KO: 23T
    * MRC: 23T
    * Multiplex: 23T
    * Sanwa: 23T
    * Spektrum: 23T

    24 Tooth
    * Hitec: 24T !!!

    25 Tooth
    * Ace/Thunder: 25T
    * Cirrus: 25T
    * Duratrax: 25T
    * Futaba: 25T
    * Hobbico: 25T (Some servos like the CS-170 uses 24 splines)
    * HPI: 25T
    * Kyosho: 25T
    * Power HD: 25T
    * Savox: 25T
    * Tamiya: 25T
    * Team Associated: 25T
    * Tower: 25T
    * Traxxas: 25T

    !!! : Some (very) new Hitec servos have a 25T spline.
    Alt-248 on the number pad =

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