ARRMA Diff Case Set 37T Main Gear BLX 3S RC Differential - ARAC4022

The ARRMA AR310872 Diff Case Set with 37T Main Gear (ARAC4022) is a factory replacement differential assembly designed for ARRMA BLX 3S brushless RC vehicles. This diff case set restores the centre or rear differential on compatible ARRMA models, supplying both the diff case housing and the 37-tooth main gear needed to return the drivetrain to factory specification. If you're dealing with a stripped gear, cracked case, or damaged differential after hard running, this is the correct OEM replacement part to get your ARRMA back on track.

Key Features

• Includes the complete diff case set alongside the 37T main gear, covering both the housing and drive gear in one purchase.
• Designed to factory tolerances for ARRMA BLX 3S powered vehicles, ensuring a direct-fit installation without modification.
• Suited to restoring drivetrain performance on a range of ARRMA 1/10 and 1/8 scale models across the Granite, Kraton, Senton, Typhon, and Outcast lines.
• OEM ARRMA specification replacement — not an aftermarket approximation — so gear mesh and case dimensions match the original components.
• Part number AR310872 (sold under style code ARAC4022) makes it straightforward to cross-reference against your vehicle's parts diagram.

Compatible With

• ARA4302V4T1
• ARA4302V4T2
• ARA4302V4T3
• ARA4303V4T1
• ARA4303V4T2
• ARA4303V4T3
• ARA4305V4T1
• ARA4305V4T2
• ARA4305V4T3
• ARA4306V4T1
• ARA4306V4T2
• ARA4306V4T3
• ARA4306V4T4
• ARA4312V4T1
• ARA4312V4T2
• ARA4312V4T3
• ARA4315V4T1
• ARA4315V4T2
• ARA4315V4T3
• ARA4404T1
• ARA4404T2
• ARA4408V2T3
• ARA4408V2T4
• ARA4410V2T3
• ARA4410V2T4

What's Included

• Differential case set
• 37T main gear

What You Need

• Appropriate tools for differential disassembly and reassembly (e.g. hex drivers, pin punch)
• Differential fluid (if rebuilding the full differential at the same time)
• Additional internal diff components if other parts within the differential are also worn or damaged