Traxxas 3976 - Idler Gear, 13T (1St Speed Gear) by Traxxas $13.90 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Traxxas 3976 - Idler Gear, 13T (1St Speed Gear)Brand: TraxxasPart Number: 3976Replacement or upgrade part for these Traxxas models:39036 - E-Maxx Brushless