ARRMA Mini Kraton 3S Aftermarket Center Differential 38T 0.8 Mod with Motor Plate & 15T Pinion MAKM1538S by GPM  [MAKM1538S]

Upgrade center differential for Mini Kraton 3S

This fully assembled center differential is an aftermarket upgrade designed for ARRMA Mini Kraton 3S platforms and is offered as a practical replacement for factory part number ARA-2985. The drivetrain uses 20CrMnTi steel gears inside a 7075 aluminum case, and gear geometry has been strengthened to provide tighter meshing and reduced transmission losses.

The differential is a 38T, module 0.8 unit compatible with standard 3.175mm motor shafts. The kit includes a motor plate and a 15T motor pinion (0.8 mod), and it supports motor pinions from 11T to 23T on the same 3.175mm bore. Differential oil is not supplied, so viscous tuning fluids should be added to match grip and handling preferences.

Installation notes: components that can be pre-assembled are supplied that way to simplify fitting, and use of a medium-strength threadlocker on critical fasteners is advised to keep parts secure during operation. The motor plate and accompanying hardware enable replacement of the center assembly without significant chassis changes.

Tuning guidance: because the diff arrives dry, choose viscous damping values to suit the vehicle role; for example, consider 50K CST front, 30K CST rear, and much higher center values such as 500K CST or 1000K CST depending on traction and steering response needs.

This kit is suitable for 1/16 ARRMA Mini Kraton 3S owners seeking a robust metal-gear center unit with a matched motor plate and 15T pinion, providing an easy upgrade path from ARA-2985 and increased pinion options.