The ARRMA Metal Diff Set (37T, 1.35M) is a complete, pre-assembled differential unit designed to deliver smooth power transfer and long-lasting durability in ARRMA 1/10 scale vehicles. Built with a 37-tooth, 1.35 module steel main gear, it’s engineered to handle high loads and aggressive driving.
This differential comes ready to drop into your vehicle, saving time on assembly and ensuring proper gear mesh from the start. It features hardened steel internal gears and output shafts, along with a strong composite diff case to maintain alignment under stress.
Whether you're replacing a worn diff or upgrading for better durability, this unit provides reliable performance for both brushed and brushless setups.
Key Features
- Part Number: ARA311155
- Gear: 37T (1.35 module)
- Type: Complete differential assembly
- Material: Steel gears with composite housing
- Design: Pre-assembled, drop-in replacement
- Fitment: Front or rear (depending on model)
Benefits
- Stronger than stock internals for high-power setups
- Smooth, consistent power transfer
- Pre-built design saves time and hassle
- Improved durability under heavy bashing
- Precise gear mesh reduces wear and noise
Compatibility
- ARRMA Granite 3S / Mega 4x4
- ARRMA Senton 3S / Mega 4x4
- ARRMA Typhon 3S / Mega 4x4
- ARRMA Big Rock 3S
- ARRMA Kraton / Outcast 4S (check model specs)
Quick Take
If your diff is clicking, slipping, or blown out, this is the go-to fix—strong, pre-built, and ready to drop in with zero guesswork.