ARRMA Mini Kraton 3S Hardened 20CrMnTi / 7075-T6 Rear Differential 12/30T 0.8mod MAKM1230RS by GPM  [MAKM1230RS]

Assembled hardened rear differential for Mini Kraton 3S

This GPM rear differential is an assembled, drop-in solution made to be compatible with ARRMA 1/16 Mini Kraton 3S models. It uses heat-treated 20CrMnTi steel for the key gearing and 7075-T6 aluminum for the housing parts to improve resistance to load and wear in high-torque brushless environments. Spiral-cut ring gear geometry and hardened surfaces reduce operational noise while promoting smooth torque transfer through the 12T input and 30T bevel gears at 0.8 module.

Tooth counts and module match driveshafts that use 2 mm pins, and the unit is supplied fully assembled with internal bearings fitted. Differential fluid is not included; add silicone oils to tune handling with suggested starting points of 50K cSt for front diffs, 30K cSt for rear diffs, and 500K-1000K cSt for center diffs where applicable. Fasteners are pre-installed, but a medium-strength thread locker on key screws is recommended to prevent loosening under vibration.

Install this assembled rear differential when upgrading ARRMA Mini Kraton 3S drivetrains for better durability and smoother power delivery compared to stock components in demanding brushless setups.