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Thread: GD-600

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Old 09-19-2004, 12:35 AM   #21
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Default Re: GD-600

Quote:
Originally Posted by EeePee
DUDE!!! I'll take one please. Put me on the list.
Just keep an eye out for a future add, I have to talk to peaple first.

Thanks, the Dude
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Old 09-20-2004, 08:22 AM   #22
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Default Re: GD-600

Here's a chart that I and I'm sure others have done, that shows the gear ratios of the GD-600 on a TXT-1 tranny with different pinions. Thanks to rckjeep for pointing out the correct tranny ratio. I put it inbetween code tags so the fixed width formating would keep everything lined up.

TXT-1 Tranny ratio w/axles: 12.74
redux w/o gd-600 w/9t pinion: 56.62 (baseline measurement. I would venture to guess this is where alot of crawlers are currently, but looking for more torque and control, with less wheelspeed)
GD-600 comes with 46t 48p spur gear and 5mm output shaft
5mm pinions available here: http://home.comcast.net/~milemarkers...ns/Pinions.htm among others I'm sure. $17 shipped from above site, each. (ouch!)
PM Dude if you're interested in getting your shaft turned to accept standard 3.2mm pinions.

Code:
GD redux: 2.5:1 (18t 48p pinion on motor - stock as supplied from Great Planes)
Output shaft pinion:    tranny ratio:   final redux:
15t                     34 (stock)      85
14t                     36.4            91
13t                     39.2            98
12t                     42.5            106.3
11t                     46.3            115.6
10t                     51              127.5
9t                      56.6            141.5

GD redux: 3:1 (15t 48p pinion on motor)
Output shaft pinion:    tranny ratio:   final redux:
15t                     34 (stock)      102
14t                     36.4            109.2
13t                     39.2            117.6
12t                     42.5            127.5
11t                     46.3            139
10t                     51              153
9t                      56.6            170

GD redux: 3.5:1 (13t 48p pinion on motor)
Output shaft pinion:    tranny ratio:   final redux:
15t                     34 (stock)      119
14t                     36.4            127.4
13t                     39.2            137.2
12t                     42.5            149
11t                     46.3            162
10t                     51              179
9t                      56.6            198

GD redux: 3.8:1 (12t 48p pinion on motor)
Output shaft pinion:    tranny ratio:   final redux:
15t                     34 (stock)      129.2
14t                     36.4            138.3
13t                     39.2            149
12t                     42.5            161.5
11t                     46.3            176
10t                     51              194
9t                      56.6            215.1
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Old 09-29-2004, 05:17 PM   #23
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Default Re: GD-600

Does any body have an idea of what pinions to use when your using a e-max trans with a gd-600 and txt rears to get a low crawl ratio and also what spur to use on the trans any help would be appreciated. :?
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Old 10-13-2004, 09:39 PM   #24
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Default Re: GD-600

I mounted my tranny backwards so my batteries would be in the front . my question is with a gd 600 can I run a normal rotation motor and does any one know if DUDE is still around ?? is the gd 600 a 5 mm shaft ?? thanks


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Old 10-13-2004, 10:55 PM   #25
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Default Re: GD-600

Yes when running a GD600 with tranny backwards us a normal rotation motor.I think the shaft is 5 mm.
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Old 10-23-2004, 10:49 PM   #26
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Default Re: GD-600

I ordered the pinion gear that is drilled out . it has been 2 weeks and they will not return my emails . at this point i would say do not order from them ! when and if i get it i will let you know about the quality
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Old 10-24-2004, 12:00 AM   #27
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Default Re: GD-600

Quote:
Originally Posted by RocJoc
Does any body have an idea of what pinions to use when your using a e-max trans with a gd-600 and txt rears to get a low crawl ratio and also what spur to use on the trans any help would be appreciated. :?
well here is a equation that can help you out.....

# of spur teeth/ # of pinion teeth = r

(im using a 72t spur and a 9t pinion this = 8 )

multiply that by the trans ratio which in first gear is 2.76

8 x 2.76 ( you could use the ratio for second gear as well which is 1.72)

take that and multiply it by 2.5 or whatever your ratio on your gd-600 is.

im using a 3.1 to 1 ratio.....so i get

3.1 x 8 x 2.76 =

then multiply that again by the txt axle ratio which is 2.0 to 1....

so i get 3.1 x 8 x 2.76 x 2 = final crawl ratio.

in my example, first gear crawl ratio is 136.9 and second gear is 85.31

you want to use a 72t spur on your truck.....also you may want to use a 9-12 tooth pinion....they worked great in my old truck. and if your looking for a really low crawl ratio you may need to change the pinion on your gd-600 to a 12 tooth....it gives you a 3.8:1 ratio wich can give you that extra torque you may need.

hope this some how helps.....i also have a post in general crawlers on how to calculate ratios....you should check it out if you need some extra info.
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Old 10-24-2004, 02:31 PM   #28
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Default Re: GD-600

Thanks alot clodgod
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Old 10-24-2004, 03:35 PM   #29
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Default Re: GD-600

no problem man
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Old 04-08-2005, 04:51 PM   #30
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Default

Could anyone tell me how to figure in tire size on the final ratio? Also how did you get 6.37 on the juggy tranny? I keep geting 1.75. Maybe I missed a gear?
Thanks
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