Search Arrma Granite Grom Mega 380

Explore the catalog

VehiclesArrma Granite Grom Mega 380UpgradesOil-filled front and rear differentials

Oil-filled front and rear differentials

Arrma Granite Grom Mega 380 · ARA2102

Sealed, oil-filled axle differentials give you a defined oil setting to tune how drive is shared between the wheels. They require drivetrain disassembly and later oil service, so inspect the fitted parts before replacing a working pair.

← Back to vehicle upgrades

Parts & installation

Manufacturer documented
Vehicle
Arrma Granite Grom Mega 380ARA2102
Position
front / rear
Change
Replace the front and rear differential assemblies with factory-filled 3000cSt oil differentials.

Parts needed

Both axles: one pair or two single sold packs
PartQty
ARA-3067ARRMA Assembled Oil Filled Differential 30T 0.8Mod, 3000cSt Oil: GROM2

Manufacturer-documented offering for the exact brushed edition; no measured traction or service-life improvement verified. Check the fitted revision before ordering.

Installation notes

  • Applies to the brushed ARA2102 edition. Inspect the installed differential first; later service revisions and secondhand modifications can differ from the original exploded drawing.
  • Replace the two complete axle differentials as assemblies; retain the original differential covers, chassis, input gears, center driveline and cover fasteners. The ARA311193 package includes its differential bearings.
  • For two ARA-3067 single packs, retain serviceable original differential bearings if not supplied. The product inventory does not separately itemize bearings.
  • Use the factory 3000cSt fill as the package baseline. Oil viscosity changes differential action; no optimum oil for every surface or measured traction/durability improvement is established here.
  • This mechanical change requires no new transmitter, receiver, servo, motor, ESC, battery, charger, spur or pinion. Keep the original supported 2S brushed power system and stock wheels.
  • ARA311193 is discontinued. The manufacturer links the one-piece ARA-3067 alternate; two singles replace a pair. Exact ARA-3067 fitment is presently confirmed here only for Granite ARA2102.

Sources

ARRMA oil-filled differential pair, ARA311193
  • Maker product information, applicable models and supporting parts.
ARRMA Granite Grom Mega 380 ARA2102
  • Maker product information, applicable models and supporting parts.
ARRMA ARA2102 exploded view
  • Maker instructions and assembly diagrams for the stated parts and configuration.
ARRMA ARA-3067 single oil-filled differential
  • Maker product information, applicable models and supporting parts.