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Thread: new2rocks Guide to the TRX-4

  1. #11
    Join Date
    Sep 2014
    Location
    Cary, NC
    Posts
    284

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    Updated with info about pinion gear placement and spur/pinion mesh.
    BowHouse RC, Helios RC, GCM #tinytruck Team

  2. #12
    Join Date
    Sep 2014
    Location
    Cary, NC
    Posts
    284

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    Latest round of updates includes links to some good video reviews, recommended maintenance/vehicle checks before driving, motor recommendations, and links to Harley's excellent videos showing tranny and axle disassembly.
    BowHouse RC, Helios RC, GCM #tinytruck Team

  3. #13
    Join Date
    Sep 2014
    Location
    Cary, NC
    Posts
    284

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    Updated the spur/pinion mesh section based on further testing and monitoring forums/FB. The stock motor position (hole "C") leaves mesh too tight with the stock pinion (11T). Placing the motor at hole "D" with the stock pinion provides much better mesh. Based on bench testing other pinion sizes, the manual's recommended motor positions for other spur/pinion combos also appears to be off (too tight) by one hole, so recommendation is to use one hole further out that recommendation in the manual.


    Also, pinion alignment with the spur gear appears to be off on many of the first production examples. Recommendation is to check alignment and adjust as needed before running the truck.
    BowHouse RC, Helios RC, GCM #tinytruck Team

  4. #14

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    have you mentioned that know traxxas has Over-Drive and Under-Drive gear options for the axles. and spools are also out for those having micro servo issues, and a Single speed as an option.

    SSD has a Portal Delete kit which may open up your wheel and tire options. but on flip side affects your gearing greatly.

    dont know if you covered these points but just thought i would mention it incase.

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