Re: Great Dane excavating co.
Two things I would suggest are, six tooth pinion gear on the motor shaft, gives you way more torque. and go back on the rear end rigging and loosen all the hardware bolts so the axles will articulate better. If it's too ridged back there you can get stuck most anywhere. One more suggestion is softer more aggressive tire tread and super singles on the front. The Tamiya tires just plug up with sand and are too rigid just like your last picture. RC4WD tires work well on mine!
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