I,m running a mamba max 4600 with a 19t pinion & 4600 stickpacks,Durga runs sweet and i had no problems in the heat at Coventry today.
Double check your diffs, i melted mine once because they were not tightened properly.
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Hobao H2 Pro
xbox/ps3/Wii U : budge1972 (add me) 
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