SUMO / Petroworks GRS I 4.16 Transfer Case Gears Basic Kit

SUMO GRS I Gears makes your Transfer Case 83% lower than stock in low-range and 12% lower than stock in high-range.

These gears were developed specifically to recover lost power when adding 28"-30" tires.

These are "Sumo Gears" which are made by the same Japanese manufacturer as the OEM Transfer Case Gears. They are the main supplier of aftermarket gears to the US Market.  They were based and designed and built from the gears that Petroworks originally built in the early/mid 1990's.

Kit Includes:

(x1) Set of new GRS I 4.16 gears

(x2) Countershaft Needle Bearings

(x1) Countershaft

(x1) Countershaft O Ring

(x2) Large Seals

(x1) Small Seal

(x1) Shifter Sheet (Petroworks Polyurethane Shifter Sheet)

(x2) Thrust washers

(x1) Large Case Gasket

(x1) Small Case Gasket