The GPM SLA155618TLG kit pairs a low-CG aluminium gear adapter with a steel 32 pitch 56T spur gear and an 18T motor gear to produce predictable power transmission for the Traxxas Slash 4X4. This configuration supports multiple gear ratios so experienced hobbyists can tune acceleration versus top speed to match track conditions and drivetrain preferences. The steel spur and pinion combination is selected for consistent meshing and reliable engagement under varied load.