Metaris J' Ratio Upper Gear Part No: MPN600055

The MPN600055 J' Ratio Upper Gear is manufactured to deliver exceptional performance and durability within heavy-duty manual transmissions. Built for high torque environments, it supports consistent shifting, reduced drivetrain stress, and smoother operation across long routes and harsh operating conditions. This upper gear is an excellent fit for fleet maintenance programs and technicians rebuilding driveline systems that require precise ratios and long-term reliability. Its sturdy construction ensures dependable performance on commercial, regional, and vocational truck platforms.