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VehiclesArrma Typhon 223S BLX DSCUpgradesMetal diff conversion

Metal diff conversion

Arrma Typhon 223S BLX DSC · ARA4306V4

This swaps the axle differential's composite main gear for a matched metal-gear assembly or rebuild. It is an option when replacing worn gears, but installation on this exact Typhon edition still needs confirmation and the material change alone does not prove greater durability.

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Parts & installation

Community reported
From
Arrma Kraton 4S BLX V2ARA4408V2
Position
front / rearNot the center differential
Change
Composite main gear to metal main gear

Parts needed

Per differential
PartQty
ARA311155Metal differential set · 37T, 1.35 Mod1

Upgrade notes

  • Requires ARA311153: Matching metal input gear · 13T, 1.35 Mod.
  • Already listed for the Typhon 223S; inspect yours before reuse.

Exact-edition installation not yet confirmed.

Installation notes

  • Choose either the complete assembly or a rebuild.
  • Rebuild: ARA311152 needs the ARA311154 case and ARA311153 input gear.
  • Inspect reused parts. This is not a complete installation checklist.
  • Applies to the front and rear differentials, not the center differential.
  • Scope: Typhon 223S BLX ARA4306V4 and Kraton 4S BLX V2 ARA4408V2. Other editions need separate checks.
  • Metal gearing alone does not establish a durability improvement or a higher battery rating.

Sources

Typhon: parts to convert 223S diffs to metal
  • The opening post proposes ARA311152 plus ARA311154. Reply 2 suggests ARA311155 as a complete assembly.
  • The later ordering report does not establish a completed installation.
223S vs 4S differential interchange discussion
  • Contributors describe interchangeability and the case / main-gear difference.
  • The personal Typhon installation described is a 3S, not an identified ARA4306V4.
ARRMA main-gear requirements
  • ARRMA lists the matching ARA311153 input gear and ARA311154 case with this main gear.
  • Component requirements do not establish manufacturer approval of the Typhon conversion.
Kraton 4S V2 differential diagram, p. 5
  • Identifies the donor differential components. Shared part listings support investigation, not a verified complete swap.
Typhon 223S ARA4306V4 technical pack
  • Identifies the target edition and its ARA311153 input gear. This drawing does not document the completed conversion.