Metaris O' Ratio Upper Gear Part No: MPN600057

Designed for long-term durability and accurate driveline function, the MPN600057 O' Ratio Upper Gear performs reliably in heavy-duty transmission assemblies. Its hardened construction maintains strength under continuous load, while its refined tooth profile supports smooth transitions across gear ranges. This promotes better driveline balance, reduced wear, and dependable torque distribution in a variety of commercial truck applications. Ideal for fleets, service centers, and independent operators, this upper gear delivers stable and efficient operation whether used in long-haul, regional, or vocational duty cycles.