ARRMA Main Diff Gear 43T Spiral GP4 5mm ARA310980

Restore reliable drivetrain performance with the genuine ARRMA 43T Spiral Main Differential Gear, ARA310980. Precision-machined from tough steel, this high-quality replacement ring gear features a spiral-cut, wide-tooth design for smooth power transfer and improved torque-handling capability in demanding RC conditions. Designed for ARRMA's GP4 drivetrain configuration, the gear fits compatible 29mm differential cases and must be used with the matching ARA310979 10T spiral main input gear. Ideal for repairing worn or damaged differential gearing or maintaining a compatible ARRMA 6S drivetrain, ARA310980 is a durable replacement part for serious RC enthusiasts.

Features

• Genuine ARRMA Replacement Gear: Original manufacturer drivetrain component, part ARA310980
• 43-Tooth Main Differential Gear: Designed for compatible ARRMA differential assemblies
• Spiral-Cut Gear Teeth: Precision-machined tooth geometry for smooth, consistent power transfer
• Durable Steel Construction: Manufactured from tough steel for long-lasting performance
• Wide Tooth Profile: Designed to improve torque-handling capability in high-load drivetrain applications
• GP4 Gear Configuration: Engineered to work with the matching ARRMA GP4 spiral main input gear
• 29mm Differential Case Fitment: Compatible with specified ARRMA 29mm differential housings
• Precision Manufacturing: Consistent tooth engagement for demanding RC driving conditions
• Drivetrain Repair and Maintenance: Suitable for replacing damaged or worn main differential gears
• Compatible ARRMA 6S Applications: Used in selected ARRMA 6S and EXB drivetrains with the correct GP4 differential configuration

Specifications

• Brand: ARRMA
• Manufacturer Part Number: ARA310980
• Barcode / EAN: 5052127036399
• Product Type: Main Differential Ring Gear
• Part Category: Gears / Differential Parts
• Tooth Count: 43T
• Gear Design: Spiral Cut
• Gear System: GP4
• Material: Steel
• Specified GP4 Configuration: 5mm
• Compatible Differential Case Size: 29mm
• Required Matching Main Input Gear: ARRMA ARA310979
• Matching Input Gear Tooth Count: 10T
• Compatible Differential Case Part Numbers: ARA310983 or ARA311061
• Quantity: 1 Main Differential Gear
• Vehicle Application: Selected Compatible ARRMA 6S and EXB Models

Compatibility

ARRMA ARA310980 is designed for differential assemblies using the 43T GP4 spiral main gear, matching ARA310979 10T main input gear and a compatible 29mm differential case.

Manufacturer-listed applications include selected versions of:

• ARRMA KRATON 6S
• ARRMA KRATON 6S EXB
• ARRMA TALION 6S EXB
• ARRMA MOJAVE 6S and MOJAVE 6S EXB
• ARRMA FIRETEAM 6S
• ARRMA BIG ROCK 6S
• Other ARRMA vehicles whose official parts diagrams specify ARA310980

Compatibility varies by model generation and drivetrain configuration. Not all ARRMA 6S vehicles use the same differential gears. Always verify ARA310980 against the exact vehicle's exploded parts diagram before ordering.

Includes

• 1 x ARRMA 43T Spiral Main Differential Gear GP4 5mm - ARA310980

Required To Complete

• ARRMA ARA310979 10T Spiral Main Input Gear GP4 5mm
• Compatible ARRMA 29mm Differential Case - ARA310983 or ARA311061
• Existing or Replacement Differential Internal Gears, Outdrives, Bearings, Seals and Hardware as Required
• Appropriate Differential Fluid and Assembly Tools

FAQ

What is ARRMA ARA310980? It is a genuine ARRMA 43-tooth spiral-cut steel main differential gear designed for compatible GP4 drivetrain assemblies using a 29mm differential case.

What pinion or input gear does ARA310980 require? ARRMA specifies the matching ARA310979 10T spiral-cut GP4 5mm main input gear. Do not mix this ring gear with an incompatible input gear.

Which differential case fits this gear? ARRMA specifies the 29mm differential cases ARA310983 and ARA311061.

Will this gear fit every ARRMA 6S model? No. Compatibility depends on the vehicle's model generation, differential housing and gear configuration. Check the official exploded parts diagram before purchasing.

What does 43T mean? The gear has 43 teeth. It is designed to mesh with the specified matching 10T GP4 input gear.

What is the gear ratio with the matching 10T input gear? The 43T main differential gear and 10T input gear produce a 4.3:1 gear reduction at that gear pair. This is not the vehicle's complete final drive ratio.

What does GP4 mean? GP4 identifies ARRMA's specified gear configuration. This part must be used with the matching GP4 input gear and compatible differential case.

Is the gear made from metal or plastic? ARA310980 is precision-machined from steel for strength and durability.

Does this product include the matching 10T input gear? No. The package includes one 43T main differential gear only. The required ARA310979 input gear is sold separately.

Does it include a complete differential assembly? No. This is the main differential gear only. The differential case, internal gears, bearings, seals, outdrives and other assembly components are not included.

Can I replace just the 43T gear? Yes, provided the matching ARA310979 input gear and other differential components remain in good condition. Inspect both gears for wear, damaged teeth and improper engagement during servicing.

Is this suitable as a drivetrain upgrade? It can serve as a replacement or as part of a compatible GP4 drivetrain conversion. Any conversion must use the required matching input gear, differential case and other compatible components.

Important Notes

• Includes one 43T spiral main differential gear only
• Must be paired with ARRMA ARA310979 10T spiral GP4 main input gear
• Requires ARRMA 29mm differential case ARA310983 or ARA311061
• The matching input gear and differential case are not included
• Not a complete differential assembly
• Do not assume universal fitment across all ARRMA 6S models
• Check the exact vehicle's exploded parts diagram for ARA310980 compatibility
• Inspect mating gear teeth, bearings and differential components before reassembly
• Use appropriate differential fluid and follow ARRMA's drivetrain servicing instructions
• Correct gear alignment and assembly are important for reliable operation