Fonzon Full Metal Front Diff With Input Pinion Arrma Grom

Compact size, uncompromising durability.

The FONZON All-Metal Differential is purpose-built for the ARRMA GROM series, delivering robust power transfer in a lightweight, mini-scale package. Designed with high-strength materials and precision assembly, it’s the ultimate upgrade for durability and smooth drivetrain operation.

Whether you're tuning for performance or simply reinforcing your drivetrain, the FONZON All-Metal Differential for ARRMA GROM is ready for the challenge.

Features

• Powder metallurgy planetary gears for excellent strength and precision in compact form.
• Metal diff case (center housing) made from 7075-T6 aluminum alloy – lightweight and rigid.
• Nickel-chromium alloy steel drive cups ensure durability under high RPM conditions.
• Powder metallurgy drive bevel gear and ring gear for consistent torque transfer.
• Grade 12.9 black corrosion-resistant screws.
• Factory pre-filled with 3K cSt differential oil.
• Fully assembled and ready to install.

Fits

• Specifically designed for the ARRMA GROM series.