ARRMA AR310872 / ARAC4022 Diff Case Set 37T Main Gear — BLX 3S

The ARRMA AR310872 Diff Case Set 37T Main Gear (also known by legacy part number ARAC4022) is a genuine OEM replacement differential case set with 37-tooth main gear for ARRMA BLX 3S vehicles. This complete set includes the diff case and main gear, providing everything needed for a full differential rebuild or replacement in a single part number.

Key Features

• Genuine ARRMA OEM replacement differential case set
• Includes 37T main gear
• Complete diff rebuild set in one package
• Direct-fit replacement for ARRMA BLX 3S vehicles — no modification required
• Restores proper differential function and performance

Compatibility

• ARRMA BLX 3S vehicles

Specifications