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Originally Posted by MetalMan
I've had no problems with the stock diff in the aluminum tranny case running 4s Lipo on either a Mamba Max 4600 or Feigao 540 12s (3000 kv). However, the stock diff didn't last more than a minute in a stock tranny case with the Mamba Max 4600 motor on 4s Lipo.
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You're right, the plastic diffs will take some decent abuse. It just depends on your weight, tires and surface you run on, idler condition (very important), motor and gearing, etc. I obviously exceeded that limit, and needed a change. I am surprised to hear you have no problems with a Feigao on 4s! You must treat her well :027: