T-Works 7075-T6 Alum. Gear Box Diff. Insert ( For Team Associated RC8 B4.2/T4.2/B4.2E/T4.2E )

Constructed from 7075‑T6 aluminum with black anodizing, direct replacement for stock nylon part #81689.

Precisely locks differential position to maintain stable gear mesh for sharp throttle response.

Prevents gearbox housing hole enlargement and slop. Wear‑resistant and pressure‑resistant, retains consistent shim settings for enhanced durability under high‑intensity racing conditions.