ARRMA Front/Rear Differential Set Straight 43T with 7K Oil ARA310958

Restore smooth, reliable drivetrain performance with the genuine ARRMA Front/Rear Differential Set Straight 43T with 7K Oil, part number ARA310958. Designed for selected ARRMA 6S brushless vehicles, this factory-assembled differential provides a convenient replacement solution for worn or damaged front and rear drivetrain components.

The differential features a 43-tooth straight-cut steel main gear, tough steel internal gears and a reinforced composite housing. Metal cross shafts and inserts support durable gear operation, while included bearings allow convenient installation into a compatible differential housing.

Each unit arrives factory-assembled and pre-filled with 7,000 cSt silicone differential oil. This eliminates the need to build the internal differential from individual components or fill it before initial installation, provided the supplied oil specification suits your vehicle's setup.

ARRMA ARA310958 is listed for selected INFRACTION 6S, LIMITLESS 6S and TYPHON 6S vehicles. Because differential gear designs vary across ARRMA models and generations, always confirm the exact part number and straight-cut gear compatibility before ordering.

Key Features

• Genuine ARRMA Replacement Part: Manufacturer part number ARA310958
• Factory-Assembled Differential: Supplied ready for installation into a compatible drivetrain
• Pre-Filled with 7K Silicone Oil: Contains 7,000 cSt differential fluid
• 43T Straight-Cut Steel Main Gear: Durable 43-tooth ring gear construction
• Steel Internal Differential Gears: Designed for demanding RC drivetrain operation
• Reinforced Composite Differential Case: Strong housing for the internal gear assembly
• Metal Cross Shafts and Inserts: Provide support for the differential gear mechanism
• Bearings Included: Supplied as part of the assembled differential
• Front or Rear Installation: Suitable for either position on confirmed compatible vehicles
• Convenient Drivetrain Servicing: Reduces the need to assemble and fill a differential from individual components
• Selected ARRMA 6S Fitment: Listed for compatible INFRACTION, LIMITLESS and TYPHON 6S models

43T Straight-Cut Steel Gear Construction

The 43-tooth straight-cut steel main gear is designed to handle demanding drivetrain loads. Steel internal gears and metal cross shafts provide durability, while the reinforced composite case supports the assembled differential components.

The straight-cut gear design must be matched with the correct compatible input gear. It should not be substituted for a spiral-cut differential without confirming the corresponding drivetrain components.

Factory-Filled 7,000 cSt Silicone Oil

The differential is pre-filled with 7K (7,000 cSt) silicone oil, providing a convenient starting point for servicing compatible vehicles. Differential oil viscosity influences how freely the internal gears operate and how torque is distributed between the wheels.

Drivers using different terrain, tyres or performance setups may prefer an alternative oil viscosity. Always follow the vehicle manufacturer's recommended fluid specification when servicing the drivetrain.

Specifications

• Brand: ARRMA
• Manufacturer Part Number: ARA310958
• Barcode / EAN: 5052127035552
• Product Name: Front/Rear Differential Set Straight 43T 7K Oil
• Product Category: RC Differential and Drivetrain Parts
• Installation Position: Front or Rear
• Main Gear Tooth Count: 43T
• Main Gear Type: Straight-Cut
• Main Gear Material: Steel
• Internal Differential Gears: Steel
• Differential Case Material: Reinforced Composite
• Cross Shafts and Inserts: Metal
• Bearings: Included
• Differential Oil: Silicone
• Factory Oil Viscosity: 7,000 cSt (7K)
• Assembly Status: Factory-Assembled
• Quantity: 1 Differential Assembly
• Primary Vehicle Applications: Selected ARRMA INFRACTION 6S, LIMITLESS 6S and TYPHON 6S

Vehicle Compatibility

ARRMA's official fitment information lists this differential for the following vehicles:

• ARRMA INFRACTION 6S 4WD - ARA109001
• ARRMA LIMITLESS 6S Roller - ARA109011
• ARRMA TYPHON 6S BLX - ARA106046
• ARRMA TYPHON 6S BLX V5 - ARA8606V5
• ARRMA TYPHON 6S TLR Tuned Roller - ARA8306
• ARRMA TYPHON 6S TLR Tuned RTR - ARA8406

Additional older model revisions may also use this assembly, but compatibility must be verified against the exact vehicle's exploded parts diagram. Not all ARRMA 6S vehicles use the same differential design.

Includes

• 1 x Factory-Assembled ARRMA Front or Rear Differential
• 1 x 43T Straight-Cut Steel Main Gear (Installed)
• Steel Internal Differential Gears (Installed)
• Reinforced Composite Differential Case (Installed)
• Metal Cross Shafts and Inserts (Installed)
• Bearings (Installed)
• 7,000 cSt Silicone Differential Oil (Pre-Filled)

Required To Complete

• Compatible ARRMA Vehicle and Differential Housing
• Correct Matching Input Gear for the 43T Straight-Cut Main Gear
• Existing Compatible Drivetrain and Mounting Hardware
• Suitable RC Maintenance Tools

Frequently Asked Questions

What is ARRMA ARA310958? It is a genuine ARRMA factory-assembled front or rear differential featuring a 43T straight-cut steel main gear and 7,000 cSt silicone oil.

Is this a front or rear differential? The assembly is designed for either front or rear use on compatible ARRMA vehicles.

Does the package contain two differentials? No. One assembled differential is included. Purchase two units if your vehicle requires replacement of both front and rear differentials.

Is the differential already assembled? Yes. ARRMA supplies it factory-assembled.

Does it come with differential oil? Yes. The differential is pre-filled with 7,000 cSt silicone oil.

What does 7K oil mean? It refers to silicone differential oil with a viscosity rating of 7,000 centistokes (cSt).

What does 43T mean? The main differential gear has 43 teeth.

Is the main gear steel? Yes. ARRMA specifies a 43T straight-cut steel main gear.

Are the internal gears metal? Yes. ARRMA describes the internal differential gears as steel.

Is the differential case metal? No. The differential case is made from reinforced composite material.

Are bearings included? Yes. ARRMA confirms bearings are included with the assembly.

Will this fit the ARRMA INFRACTION 6S? ARRMA lists ARA109001 as a compatible vehicle. Other INFRACTION revisions should be checked individually.

Will it fit the ARRMA LIMITLESS? ARRMA lists the LIMITLESS ARA109011. Confirm compatibility for other LIMITLESS generations.

Will it fit the ARRMA TYPHON 6S? Yes, for the specific TYPHON 6S versions listed by ARRMA, including ARA106046 and ARA8606V5.

Does it fit the TYPHON TLR Tuned? ARRMA lists both ARA8306 and ARA8406 as compatible applications.

Can I use this differential in a KRATON or OUTCAST 6S? Do not assume compatibility. Confirm the exact differential and input gear part numbers in your vehicle's parts diagram before ordering.

Is a straight-cut differential interchangeable with a spiral-cut differential? Not automatically. The gear geometry and mating input gear must match. Replacing one design with another may require additional drivetrain components.

Can I change the factory differential oil? Yes. The differential can be serviced with a different suitable silicone oil viscosity if required for your vehicle setup.

Do I need to fill it with oil before installation? No initial filling is normally required because ARRMA supplies the unit pre-filled. Inspect the assembly before installation and follow the vehicle's service instructions.

How can I confirm fitment? Check your ARRMA model number and exploded parts diagram for ARA310958, including the matching input gear design.

Important Notes

• This listing is for genuine ARRMA ARA310958
• Includes one factory-assembled front or rear differential only
• Pre-filled with 7,000 cSt silicone differential oil
• 43T main gear uses a straight-cut tooth design
• Do not assume compatibility with spiral-cut differential input gears
• Verify the exact vehicle model and drivetrain revision before ordering
• Not a universal replacement for every ARRMA 6S vehicle
• Additional drivetrain or mounting components may be required depending on vehicle configuration
• Inspect the differential housing, input gear and bearings during servicing
• Check gear mesh and drivetrain operation before driving
• Follow ARRMA's official instructions for installation and maintenance