Complete spiral gear differential set designed to service or replace the front or rear differential assembly in compatible ARRMA 6S electric RC trucks and buggies. The kit includes a robust composite differential case and precision machined 43 tooth spiral crown gear along with matching planetary and satellite gears for smooth, efficient torque transfer. Metal cross shafts and hardened internal gears help improve drivetrain strength and durability under high loads and at high speeds. Everything needed to rebuild a diff assembly is included, making maintenance or drivetrain refresh straightforward for hobbyists and competitive drivers alike