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Any experience w/ GD-600's or other gear reductions???

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  • Any experience w/ GD-600's or other gear reductions???

    I'm looking into a way to get rid of the transmission & run a seperate motor to each axle on my AX-10. It looks like I need to get to about 16:1. Does anybody have any experience with the GD-600's?

    I'm thinking about either daisy-chaining 2 GD-600's w/ 12t pinions (3.8:1) together or posibly using an RC4wd 4:1 gear reduction box into a GD-600. Any idea if this would work and/or be reliable.

    I'll be running a pair of Crawlmaster 3014 1000kv's.

  • #2
    Re: Any experience w/ GD-600's or other gear reductions???

    GD's you want to talk to Busted.

    I have run the RC4WD GRU and loved it. It is compact and bullet proof.

    In fact, I think I still have one in my traveling "Dad's World of Hobbies"
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    • #3
      Re: Any experience w/ GD-600's or other gear reductions???

      Originally posted by Rckcrwlr
      GD's you want to talk to Busted.

      I have run the RC4WD GRU and loved it. It is compact and bullet proof.

      In fact, I think I still have one in my traveling "Dad's World of Hobbies"
      Do you have the 4:1 GRU? How much? I'll need 2, but 1 will at least get me started on the fabrication process.

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      • #4
        Re: Any experience w/ GD-600's or other gear reductions???

        Mine was a 2:1

        Let me make sure that I still have it...if you are interested...
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        • #5
          Re: Any experience w/ GD-600's or other gear reductions???

          I have a GD600 if you want...


          That being said, the biggest issue with the GD600 is that you either need to drill out your pinions for use on the output shaft or turn down the output shaft. It is a 4 or 5mm dia and most pinions are 3mm dia.

          Now if you are wanting to use a RC4WD GRU and a GD600, I would go motor into RC4WD GRU then into the GD600. With the RC4WD GRU being fixed I would put that straight to the motor, leaving the GD600 a little more accesible for intermediate pinion changes to dail in your final ratio.

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          • #6
            Re: Any experience w/ GD-600's or other gear reductions???

            Originally posted by Rckcrwlr
            Mine was a 2:1

            Let me make sure that I still have it...if you are interested...
            Oh, just a 2:1. I'm going to have to go with the 4:1 in order to regain close to factory gearing. I guess I'll just order 2 of them.

            Originally posted by Bustedcrawler
            I have a GD600 if you want...


            That being said, the biggest issue with the GD600 is that you either need to drill out your pinions for use on the output shaft or turn down the output shaft. It is a 4 or 5mm dia and most pinions are 3mm dia.

            Now if you are wanting to use a RC4WD GRU and a GD600, I would go motor into RC4WD GRU then into the GD600. With the RC4WD GRU being fixed I would put that straight to the motor, leaving the GD600 a little more accesible for intermediate pinion changes to dail in your final ratio.
            Is the GD-600 that you have already turned or does it still have the large pinion? I'm going to need two GD-600's & two GRU's to do what I want, but if you want to get rid of one, I'll take it off your hands. The larger output may not be a huge deal, since I'll not be putting a pinion on it, but probably a driveshaft yoke (if I mount the motors in the chassis).

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            • #7
              Re: Any experience w/ GD-600's or other gear reductions???

              Originally posted by EvilTwin v2
              I'm going to need two GD-600's & two GRU's to do what I want,


              How big is this thing going to be??? What is it???
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              • #8
                Re: Any experience w/ GD-600's or other gear reductions???

                Originally posted by Rckcrwlr
                Originally posted by EvilTwin v2
                I'm going to need two GD-600's & two GRU's to do what I want,


                How big is this thing going to be??? What is it???
                It's an idea I have for an AX-10 axled, 2.2 comp rig. 2 motors (Crawlmaster 3014's 1000kv), 2 gru's, 2 GD-600's, no transmission, servo-actuated front or rear dig.

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                • #9
                  Re: Any experience w/ GD-600's or other gear reductions???

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                  • #10
                    Re: Any experience w/ GD-600's or other gear reductions???

                    When I used my GD600, I just used the stock 15t output pinion it came with. If you want it then its yours, I no longer need it.

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                    • #11
                      Re: Any experience w/ GD-600's or other gear reductions???

                      IMHO use the integy gear reduction unit..
                      In my scaler i originally used a gd-600 buit I think that it led to alot of my overheating problems...
                      the inetgy unit keeps everything running nice and smooth, plus the addition of metal gears and ball bearings in it are really nice.

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                      • #12
                        Re: Any experience w/ GD-600's or other gear reductions???

                        Originally posted by crawler_king
                        IMHO use the integy gear reduction unit..
                        In my scaler i originally used a gd-600 buit I think that it led to alot of my overheating problems...
                        the inetgy unit keeps everything running nice and smooth, plus the addition of metal gears and ball bearings in it are really nice.

                        I think your overheating was related to the overal ratios that you had between the GD and the WK trans. IIRC the Integy is a 3.5 unit, and depending on the motor pinion that was on the GD it is between a 2.0 and almost 5.0 ratio.


                        Also the GD can be harder to mount up versus the integy unit as the GD was developed for a prop drive system for airplanes.

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                        • #13
                          Re: Any experience w/ GD-600's or other gear reductions???

                          Well the setup on both requires some sort of bracket to hold the reduction casing, so regardless there is going to be some fab work involved.. Luckily the brackets that Crawlin Coles made up for the GD worked perfect with the Integy unit I installed..

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