Product Description
CPP Hardened Gear Extreme Duty NV4500 Transmission
For more than 16 years, CPP Diesel has built Extreme Duty NV4500 transmissions for Cummins owners who demand more than a standard rebuild. When horsepower, heavy towing, oversized tires, aggressive clutch engagement, and power shifting began pushing factory NV4500 gears beyond their limits, we developed CPP Hardened Gear Technology to build a transmission designed for today's high-torque diesel trucks.
Every CPP Hardened Gear Extreme Duty NV4500 is built to order using premium internal components, carefully inspected parts, and our hardened gear process that has been proven in work trucks, tow rigs, street trucks, sled pullers, and high-performance diesel applications throughout North America.
Why Choose a CPP Hardened Gear NV4500?
- CPP Hardened Gear Technology
- Built to order by experienced transmission builders
- Over 16 years of proven real-world performance
- Designed for high-torque Cummins applications
- Premium synchronizers, bearings, seals, and wear components
- Ideal for towing, work trucks, street performance, and competition builds
- Backed by a 3-year warranty
Why Factory NV4500 Gears Fail
The factory NV4500 was designed for stock horsepower levels. Today's Cummins trucks frequently produce significantly more torque than the original transmission was engineered to handle. Heavy towing, oversized tires, upgraded clutches, performance tuning, sled pulling, drag racing, and aggressive shifting place tremendous shock loads on the gear teeth.
Those increased loads are one of the reasons factory gear failures can occur in modified trucks.
The CPP Difference
Rather than simply rebuilding another stock transmission, CPP Diesel builds every Extreme Duty NV4500 around our hardened gear process. The result is a transmission engineered specifically for the way diesel enthusiasts actually use their trucks today.
Our hardened gears have been trusted by Cummins owners for more than 16 years because durability—not minimum cost—has always been our priority.
Built for Real Diesel Trucks
- Daily drivers
- Heavy towing
- Commercial work trucks
- Street performance builds
- Sled pulling
- High horsepower applications
Built to Order
Every CPP Hardened Gear Extreme Duty NV4500 is assembled to order. Each transmission is carefully built, inspected, and configured for long-term durability using proven components and precise assembly procedures.
Please contact CPP Diesel before ordering to discuss your truck, horsepower goals, clutch selection, and intended use so we can recommend the proper transmission configuration.
Learn More About Manual Transmission Upgrades
Planning a complete drivetrain build? Explore our manual transmission components, clutch upgrades, drivetrain parts, and Diesel Tech articles to help you choose the right components for your Cummins project.
Warranty Information
3 YEAR UNLIMITED MILES WARRANTY ON CRAFTSMANSHIPProduct Videos
Custom Field
Product Reviews
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Best bang for your buck
Best transmission I've ever bought. Well worth the money compared to any company I've called. Jamie was very helpful when I was desperate for a transmission. I tow almost religiously with my truck and it hasn't failed me. Cpp has awesome customer service. Way above and beyond average. Definitely where my business will continue to go