The ARRMA composite differential case is a genuine replacement diff housing for compatible ARRMA 4x4 BLX 3S vehicles, helping restore accurate internal gear fitment and reliable differential operation during drivetrain servicing. This replacement diff case is precision manufactured from durable composite material to hold the internal differential gears correctly. The included diff case cap and M3 x 16mm flat head screws make it a practical service part when rebuilding a worn, cracked or damaged differential assembly in compatible ARRMA 3S and 4x4 platforms. Features Genuine ARRMA Replacement Part: Designed as a factory replacement differential case for compatible ARRMA BLX 3S vehicles Composite Construction: High-quality material provides durability for regular RC drivetrain use Precision Manufactured Fit: Made for accurate fitment of compatible differential internal parts Diff Case Cap Included: Supplied with the matching case cap for the differential housing Assembly Screws Included: Includes four M3 x 16mm flat head screws for diff case assembly Drivetrain Service Part: Ideal for replacing a worn, cracked or damaged diff case during front, centre or rear differential maintenance where applicable Specifications Brand: ARRMA Part Number: AR310772 Horizon Hobby Orderable Number: ARAC4023 Barcode: 5052127027373 Product Type: Differential case set Vehicle Compatibility: ARRMA 4x4 BLX 3S vehicles where AR310772 or ARAC4023 is listed in the manual Common Listed Applications: ARRMA Big Rock 3S 4x4, Granite 3S 4x4, Senton 3S 4x4, Typhon 3S 4x4 and related BLX 3S platforms where confirmed by the vehicle manual Material: Composite Position: Differential assembly Required Related Parts: ARRMA AR310885 and ARRMA AR310886 Included Hardware: 4 x M3 x 16mm flat head screws Quantity: 1 differential case assembly set Intended Use: Replacement differential housing part for compatible ARRMA RC drivetrain repairs and rebuilds Includes 1 x ARRMA differential case 1 x ARRMA differential case cap 4 x M3 x 16mm flat head screws FAQ Does this diff case fit every ARRMA 4x4 vehicle? No. This differential case fits ARRMA vehicles where AR310772 or ARAC4023 is listed in the vehicle manual, so OZRC recommends checking your manual before ordering. What parts are required with this diff case? ARRMA lists AR310885 and AR310886 as required related parts for this differential case. Are the diff case screws included? Yes. This pack includes four M3 x 16mm flat head screws for assembling the differential case. When should a diff case be replaced? A diff case should be replaced if it is cracked, warped, stripped at the screw holes, leaking or no longer holds the internal differential gears securely. Important Notes Check your ARRMA vehicle manual to confirm AR310772 or ARAC4023 is the correct replacement part before ordering. ARRMA AR310885 and ARRMA AR310886 are required related parts and are not included unless listed separately. This pack includes the diff case, diff case cap and screws only. Internal gears, outdrives, bearings, shims, gaskets and diff oil are not included unless listed separately. Inspect all internal differential parts during servicing, as worn gears or bearings can damage a new diff case. Refill the differential with the correct oil or grease specified for your vehicle during reassembly.
