FONZON 39/12T FULL METAL SPLIT FR/RR DIFF – ARRMA 8S SERIES

Designed for brute power and precision control.

The FONZON Front/Rear Differential for ARRMA 8S vehicles is built to handle the extreme torque and stress of large-scale bashing. With fully CNC-machined internals and a premium aluminum housing, it ensures smooth power delivery, long-term durability, and easy drop-in installation.

Whether you’re pushing the limits in off-road mayhem or upgrading for drivetrain reliability, the FONZON 8S Front/Rear Differential is ready to deliver unmatched performance and confidence.

Features

• All gears CNC-machined from nickel-chromium alloy steel for maximum strength(steel makeup#4340).
• Helical gear design for smoother engagement and quieter operation under load.
• Metal diff case (center housing) crafted from 7075-T6 aluminum alloy for superior rigidity and reduced weight.
• Grade 12.9 corrosion-resistant screws ensure long-lasting assembly integrity.
• High-quality matched drive cup bearings provide stable, efficient rotation.
• Factory pre-filled with 100K cSt differential oil.
• Fully assembled and ready to install no setup required .

Fits

Direct fit for ARRMA 8S platform models, including but not limited to:

• Kraton 8S
• Outcast 8S
• EXB Series 8S Models