GPM Racing 20CRMNTI Steel Center Diff Gear Set 36T/12T (M1.5) for Arrma 1/5 Kraton 8S (MAKX1236TS)

Centre Differential Gear Set for ARRMA 1/5

This RC-scale centre differential gear set is manufactured from 20CrMnTi steel and includes a 36T center gear and a 12T idler gear, both 1.5 module. It is offered as a direct replacement for the factory parts ARA310919 and ARA310921, intended for ARRMA 1/5 Kraton and Outcast platforms listed below. The components are focused on strength and long-term wear resistance within an RC drivetrain context.

Use this set when rebuilding or reinforcing the center differential to restore correct gear mesh and drivetrain behavior after wear or impact. The gears are intended for standard installation into the existing center diff assembly; check gear alignment, backing plates, and bearings when replacing parts to maintain reliable operation.

Packing includes

• Center Diff Gear 36T Mod 1.5 – 1pcs
• Idler Gear 12T Mod 1.5 – 1pcs

Original Name / Part No:

ARA310919,ARA310921

Compatible Models

• ARRMA 1/5 Kraton 4X4 8S BLX Brushless Speed Monster Truck RTR-ARA110002
• ARRMA 1/5 Outcast 4WD 8S BLX Stunt Truck RTR-ARA5810
• ARRMA 1/5 Kraton 8S EXB 4X4 Roller Brushless Speed Truck-ARA5208
• ARRMA 1/5 Kraton 4X4 8S BLX EXB Brushless Monster Truck RTR-ARA5808V2
• ARRMA 1/5 Outcast 8S EXB 4X4 Roller Brushless Stunt Truck-ARA5210
• ARRMA 1/5 Outcast 4X4 8S BLX EXB Brushless Stunt Truck RTR-ARA5810V2

This gear set serves as a material-upgraded replacement for the ARRMA 1/5 center differential, offering a like-for-like fit for the listed models and intended to restore drivetrain durability without modifying the original assembly layout.

Is this gear set a direct swap for the original ARRMA parts?

The set is supplied to replace factory parts ARA310919 and ARA310921 and is intended for a direct fit into the existing center differential assembly on the listed models.

What material are the gears made from and why does it matter?

The gears are made from 20CrMnTi steel, chosen for improved wear resistance and strength compared with typical softer alloys used in some stock parts.

Do I need extra parts to install these gears?

No additional parts are listed as required, but inspect bearings, shims, and diff seals during replacement and replace worn items to ensure correct mesh and longevity.

Which ARRMA models are confirmed compatible?

Compatibility is listed in the article and includes several 1/5 Kraton and Outcast models such as RTR-ARA110002, ARA5810, ARA5208, ARA5808V2, ARA5210, and ARA5810V2. Write Product Review Please sign in your account before you can write any review. Sign In Close

Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.