The upgrade the little senders earn. GROM-class trucks get driven like their big brothers, and the differential is where enthusiasm eventually presents its bill — a diff that's gone crunchy or spins one wheel helplessly is the classic symptom. This genuine Arrma replacement arrives factory assembled and factory filled with 3000cSt silicone oil: no tiny gears to shim, no oil to measure — pull the old diff, drop this in on its included bearings, and drive. The 30T 0.8Mod main gear and tough internals are built for the loads a brushless GROM actually generates.

Fitment

Fits the Arrma GROM family across all three scales, per Arrma's own compatibility listing: 1/14 Typhon GROM (brushless 223S and brushed), 1/16 Mojave GROM (RTR and RTA kit), 1/16 Freedom Flyer GROM, 1/16 Quake GROM and 1/18 Granite GROM — one drivetrain family under five different trucks. One diff serves the front or rear axle, so 4X4 owners refreshing both ends want two (Arrma's ARA311193 is this same diff as a convenient 2-pack). The 3000cSt fill is Arrma's standard GROM tune — balanced and predictable for bashing and backyard racing alike.

Specifications

Brand: Arrma
SKU: ARA-3067
Product: Assembled oil-filled differential — 1pc
Main Gear: 30T, 0.8Mod
Oil Fill: 3000cSt silicone, factory filled
Included: Bearings fitted
Fits: GROM family: Typhon (1/14), Mojave, Freedom Flyer, Quake (1/16), Granite (1/18) — front or rear
2-Pack Sibling: ARA311193 — same diff ×2