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A. Check out the Tranzilla second gear versus stock. Tranzilla, shown on right, has much thicker gear teeth. The stock gears are helical cut, whereas Tranzilla gears are 22-degree helix. Also, no modifications are necessary to accommodate these in the stock case because the 22-degree -cut gears actually generate less thrust. Stock gears also generate more heat because of the cut, which are designed for quiet operation. RSG sees much lower trans temps in Tranzilla, so it’s a double win.