ARRMA 37T Composite Differential Case Set Suits 3S 4X4 BLX AR310872

The ARRMA AR310872 Differential Case Set is a genuine replacement 37-tooth differential housing for compatible ARRMA 4X4 BLX vehicles needing a new diff case, cap or integrated ring gear.

The main ring gear and differential case are moulded as one composite component for strength and consistent alignment. Precision-formed gear teeth support smooth drivetrain operation, while the accurately moulded case helps maintain a reliable seal when assembled with the correct gasket, internal gears and differential fluid.

Features

• Genuine ARRMA replacement differential case set
• Integrated 37-tooth ring gear and differential case
• Tough composite construction for durability under demanding operating conditions
• Precision-manufactured gear teeth for smooth drivetrain operation
• Accurately moulded case surfaces help maintain the differential seal
• Suitable for rebuilding compatible front or rear differential assemblies where AR310872 is specified
• Ideal for replacing stripped ring-gear teeth or a cracked or leaking differential housing

Specifications

• Brand: ARRMA
• Product: Differential Case Set
• Manufacturer Part Number: AR310872
• Catalogue Code: ARAC4022
• Product Type: Differential case and main ring gear
• Main Gear Tooth Count: 37T
• Material: Composite
• Drive Platform: Selected ARRMA 4X4 BLX vehicles
• EAN: 5052127030502

Compatibility

• Selected ARRMA BIG ROCK 3S BLX and 223S BLX models
• Selected ARRMA GRANITE 3S BLX and 223S BLX models
• Selected ARRMA SENTON 3S BLX and 223S BLX models
• Selected ARRMA TYPHON 3S BLX and 223S BLX models
• Selected ARRMA VORTEKS 3S BLX and 223S BLX models
• Selected ARRMA INFRACTION 3S BLX and VENDETTA 3S BLX models
• Selected ARRMA KRATON 4S BLX and OUTCAST 4S BLX models
• Other ARRMA vehicles that specify AR310872 or ARAC4022 in the official exploded parts diagram

Includes

• 1 × 37T ring gear with integrated differential case
• 1 × Differential case cap

FAQ

Is AR310872 a complete differential? No. AR310872 contains the integrated 37T ring gear and differential case plus the case cap. Internal gears, outdrives, bearings, gasket, O-rings, pins, screws and differential fluid are not included.

Can AR310872 be used in the front or rear differential? AR310872 can be used in compatible front or rear differential assemblies where the vehicle’s exploded diagram specifies this part number.

Will AR310872 fit every ARRMA 3S vehicle? No. ARRMA models and production versions can use different differential components. OZRC recommends confirming AR310872 in the exploded parts diagram for the exact vehicle before ordering.

What should be checked when rebuilding the differential? Inspect the input gear, internal gears, outdrives, bearings, gasket and seals for damage or wear. Correct shimming, sealing and fluid filling are also important for smooth operation.

Important Notes

• Confirm AR310872 or ARAC4022 in the vehicle manual or exploded parts diagram before purchasing.
• This set is not a complete or factory-assembled differential.
• Differential gears, outdrives, bearings, seals, gasket, pins, screws and differential fluid are required separately or reused from the existing assembly.
• Check the mating input gear for damaged or worn teeth before installing the new ring gear.
• Use the differential fluid grade and assembly procedure specified for the vehicle.
• Incorrect shimming or damaged bearings can cause excessive gear noise, binding or premature wear.