ARRMA Centre Differential Set 50T AR220029 / ARAC4013

Restore your RC vehicle's drivetrain with the genuine ARRMA Centre Differential Set 50T, part number AR220029, also known as ARAC4013. Designed for selected ARRMA 6S BLX 4WD vehicles, this comprehensive differential replacement set includes a 50-tooth spur gear, reinforced differential case, internal steel gears, outdrives, seals and associated assembly hardware.

The centre differential helps distribute drive torque between the front and rear axles, allowing controlled differential action during acceleration, cornering and changes in traction. Replacing worn or damaged differential components can help restore smooth drivetrain operation and consistent power transfer.

ARRMA uses tough steel crown, planetary and satellite gears for durability under demanding driving conditions. A reinforced differential case, precision-machined gear teeth and metal cross shafts provide reliable component fitment and support regular drivetrain servicing.

This is a genuine ARRMA replacement part for compatible 6S BLX platforms. Compatibility varies between model generations and drivetrain configurations, so always confirm AR220029 or ARAC4013 against your vehicle's exploded parts diagram before purchase.

Key Features

• Genuine ARRMA Replacement Part: Manufacturer part number AR220029
• Horizon Hobby Reference: ARAC4013
• 50T Spur Gear: Includes a 50-tooth centre differential spur gear
• Steel Internal Gears: Tough crown, planetary and satellite gears for demanding drivetrain use
• Reinforced Differential Case: Designed for strength under high drivetrain loads
• Precision Gear Teeth: Manufactured for consistent gear engagement
• Metal Cross Shafts: Support the internal differential gear assembly
• Diff Case Insert: Additional support within the differential housing
• Replacement Outdrives: Includes two differential output drive components
• Sealing Components: Supplied with silicone O-rings and differential gasket
• Shims and Hardware Included: Provides the listed internal assembly and fastening components
• Drivetrain Maintenance Solution: Suitable for repairing a damaged or worn compatible centre differential
• Selected ARRMA 6S Compatibility: Applicable to supported KRATON, TYPHON, TALION, OUTCAST, NOTORIOUS and MOJAVE variants

Centre Differential Function

The centre differential distributes power between the front and rear drivetrains of a compatible 4WD RC vehicle. Its internal gears permit different front and rear wheel speeds when traction and loading conditions change.

Correct differential assembly, lubrication and maintenance are important for smooth operation. Always use the differential fluid grade specified for your vehicle and driving requirements.

Specifications

• Brand: ARRMA
• Manufacturer Part Number: AR220029
• Horizon Hobby Part Number: ARAC4013
• Alternative Retailer SKU: ARA220029
• Barcode / EAN: 5052127007481
• Product Type: Centre Differential Set
• Application: RC 4WD Drivetrain
• Spur Gear Tooth Count: 50T
• Included Straight Crown Gear: 43T
• Satellite Gear Tooth Count: 10T
• Satellite Gear Quantity: 4
• Planetary Gear Quantity: 2
• Internal Gear Material: Steel
• Differential Case: Reinforced
• Cross Shafts: Metal
• Output Drives: 2
• Diff Pins: 2.25 x 9.8mm
• Mounting Screws: M3 x 12mm Button Head
• Set Screw: M4 x 3mm
• Primary Vehicle Family: Selected ARRMA 6S BLX Models
• Quantity: 1 Differential Set

Vehicle Compatibility

This differential set is listed for selected versions of the following ARRMA 6S BLX vehicle families:

• ARRMA KRATON 6S BLX
• ARRMA TYPHON 6S BLX
• ARRMA TALION 6S BLX
• ARRMA OUTCAST 6S BLX
• ARRMA NOTORIOUS 6S BLX
• ARRMA MOJAVE 6S BLX

Fitment is model- and generation-dependent. Not every version of these vehicles uses the same centre differential assembly. Check the original part number and your vehicle's exploded diagram before ordering.

Includes

• 1 x 50T Spur Gear
• 1 x Differential Case
• 1 x Differential Case Insert
• 4 x 10T Satellite Gears
• 2 x Metal Cross Shafts
• 2 x Planetary Gears
• 2 x Front/Rear Differential Outdrives
• 2 x Differential Pins - 2.25 x 9.8mm
• 2 x Silicone O-Rings
• 1 x Differential Gasket
• 4 x Satellite Gear Shims
• 4 x Metal Cross Shaft Inserts
• 1 x 43T Straight Differential Crown Gear
• 4 x M3 x 12mm Button-Head Screws
• 1 x M4 x 3mm Set Screw

Required To Complete

• Compatible ARRMA Vehicle and Centre Differential Mounting Assembly
• Suitable Silicone Differential Oil
• Appropriate RC Assembly and Maintenance Tools
• Any Additional Vehicle-Specific Hardware Not Supplied with This Set

Frequently Asked Questions

What is ARRMA AR220029? It is a genuine ARRMA 50-tooth centre differential replacement set, also identified by Horizon Hobby part number ARAC4013.

Are AR220029 and ARAC4013 the same part? Yes. ARRMA identifies AR220029 as its manufacturer part number and ARAC4013 as the Horizon Hobby reference for this product.

Is ARA220029 another reference for this part? Yes. Some retailers use ARA220029 for the same 50T centre differential set.

What does 50T mean? It means the included centre differential spur gear has 50 teeth.

What does a centre differential do? It distributes power between the front and rear drivetrains while allowing differential action when the axles experience different loads or traction.

Does the kit include the 50T spur gear? Yes. One 50-tooth spur gear is included.

Does the kit include internal differential gears? Yes. It includes four 10T satellite gears and two planetary gears.

Are the differential gears metal? ARRMA specifies steel crown, planetary and satellite gears.

Does it include the differential case? Yes. The differential case and case insert are included.

Are the outdrives included? Yes. Two differential outdrives are supplied.

Are seals and shims included? Yes. The set includes silicone O-rings, a differential gasket and satellite gear shims.

Does the set include mounting screws? Yes. It includes four M3 x 12mm button-head screws and one M4 x 3mm set screw.

Is differential oil included? Differential oil is not listed in the manufacturer's package contents. Purchase suitable silicone differential oil separately.

Will this fit my ARRMA KRATON 6S? It is listed for selected KRATON 6S BLX models. Check the exact vehicle version and exploded diagram because centre differential designs can differ between generations.

Will it fit an ARRMA TYPHON 6S? It is listed for selected TYPHON 6S BLX versions. Confirm your specific model's centre differential part number before ordering.

Is it compatible with the ARRMA MOJAVE 6S? Retailers list selected MOJAVE 6S BLX applications. Fitment should be verified against the specific vehicle revision.

Will it fit the ARRMA KRATON 8S? Do not assume compatibility. This is a 50T differential set associated with selected 6S BLX drivetrains, not a universal ARRMA 8S replacement.

Is this a complete ready-filled differential? The manufacturer lists the internal components and hardware but does not specify prefilled differential oil. Treat it as a differential set requiring correct assembly and fluid servicing.

Is there a newer replacement part number? ARRMA's historical cross-reference lists ARA310959 as a replacement for AR220029. Verify current vehicle fitment and specification before substituting parts.

How can I confirm compatibility? Find your ARRMA model number, consult the official exploded parts diagram and match the centre differential part number before purchase.

Important Notes

• This listing is for genuine ARRMA AR220029 / ARAC4013
• Includes one 50T centre differential component set
• Designed for selected ARRMA 6S BLX vehicle versions
• Not guaranteed to fit every KRATON, TYPHON, TALION, OUTCAST, NOTORIOUS or MOJAVE generation
• Not a universal replacement for ARRMA 8S vehicles
• Confirm the exact part number against your vehicle's exploded diagram
• ARRMA's historical parts cross-reference identifies ARA310959 as a replacement reference
• Differential oil is not specified as included
• Use the correct differential fluid and follow the vehicle manufacturer's assembly instructions
• Inspect mating gears, bearings, driveshafts and differential mounts during servicing
• Ensure correct gear mesh, sealing and screw tightness before operating the vehicle