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Unleash Power and Durability with CPP Diesel's Extreme Duty Transmissions When it comes to handling the immense torque and power of Cummins diesel engines, a reliable transmission is paramount. At CPP Diesel, we offer a range of high-performance manual transmissions designed to meet the demands of heavy-duty applications. Whether you're towing, off-roading, or seeking enhanced performance, our NV4500, NV5600, G56, and HD Case Extreme-er G56 transmissions are engineered to deliver exceptional str …