This complete kit includes four new precision cut gears, counter shaft, needle bearings, shims, o-ring, gaskets, and upgraded Trail-Safe input/output seals.
Trail-Gear recommends use of a heavy-duty front output shaft with this product.
Choosing the right material for our gears was our top priority. Gears that perform well under load and street driving require a high-quality steel alloy material. We chose Japanese alloy SCM415 for its great strength and wear resistance. SCM415 outperforms the 8620 material in yield and ultimate tensile strength resulting in a gear that is less prone to chipping or cracking. SCM415 also retains its strength under high-temperature use. High carbon materials such as SCM420 or 8620 are not the best choice in our experience and opinion as they do not carburize as well and can become brittle.
Note: The recommended tire size for the 4.16 gears is 29"-30"
PLEASE NOTE: NON-USA Models may need a new US Specific Low Speed Output Gear
