Originally Posted by bambambennett

The stock nylon gears will work for mod but has a problem. Nylon has a reduced surface friction than alloy but the problem with the nylon on nylon on nylon,and why an alloy idler is available, is tooth deflection. Nylon to nylon gear surfaces and heavy loads will cause gear whip(tooth deflection). This causes more drag in the trans and can cause premature wear. I dont recomend running an alloy idler mating to the alloy top shaft, this too accelerates surface wear. I run alloy top shaft to nylon idler to alloy idler to nylon diff gear. Way less drag this way and wear decreases.