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TRANSMISSION / TRANSFER CASE

TRANSMISSION / TRANSFER CASE — 2003–2007 DODGE RAM 5.9L CUMMINS

Meet the backbone of your build. CPP Diesel engineers and supplies a CPP-exclusive Extreme Duty manual lineup—NV4500, NV5600, and G56—built in-house for real Cummins torque. Pair our manuals with proven 48RE options, deep pans, coolers, and NP271/NP273 parts to tow harder, race smarter, and daily with confidence.

Featured: CPP-Exclusive Extreme Duty Manuals

Automatic (48RE) — Towing & Performance

Manual Clutches & Hydraulics

Transfer Case — NP271 / NP273

Why Buy Drivetrain from CPP Diesel?

  • CPP-exclusive Extreme Duty manuals: purpose-built NV4500/NV5600/G56 options for serious torque and towing.
  • Complete 48RE coverage: proven SunCoast, BD, ATS builds plus pans, coolers, and electronics fixes.
  • End-to-end parts: clutches, hydraulics, lines, and NP271/NP273 internals for one-stop service.

Tech Notes & Fitment

  • Year splits: NV5600 through early ’05; G56 from ~’05.5–’07. 48RE automatics across ’03–’07.
  • Cooling & ATF: Deep pans and cooler line upgrades help keep 48RE temps in check under load.
  • Manual clutch break-in: Most SB/Valair kits require 500–1,000 gentle miles prior to hard pulls.

Frequently Asked Questions

What’s special about CPP’s Extreme Duty NV4500/NV5600/G56?

They’re CPP-exclusive manual builds with upgraded internals and assembly practices to handle Cummins torque with smoother shifts and higher durability. See our manuals hub for specs and availability by year.

Should I choose NV5600 or G56 for my 03–07?

’03–’05 trucks typically use NV5600; ’05.5–’07 use G56. If you’re swapping, NV5600 is a cast-iron tank with close ratios; G56 is lighter with great shift feel. We can match gearing, clutch, and hydraulics to your power and use case.

Best reliability upgrades for a 48RE tow rig?

Start with a quality build (SunCoast/BD), add a deep pan, metal pressure transducer upgrade, and braided line/bypass kit to control heat and line pressure.

Which transfer case parts do I need for a rebuild?

Match NP271 vs NP273, then choose a rebuild kit (bearings/seals), chain, input/output shafts, and any worn forks. Our 271/273 section groups everything by platform.

  • CPP NP271/273 MAIN SHAFT DRIVE HUB BUSHING

    CPP NP271/273 MAIN SHAFT DRIVE HUB BUSHING

    The NP271/273 Main Shaft Drive Hub Bushing is a crucial component designed to ensure optimal performance and durability in your vehicle's transmission system. This high-quality drive hub bushing is specifically engineered for the main shaft of the NP271...
    $69.99
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  • CPP NP271 RANGE FORK, DODGE

    CPP NP271 RANGE FORK, DODGE

    The NP271 Range Fork designed for Dodge vehicles is a must-have component for seamless gear shifting and optimal performance. Crafted with precision and durability in mind, this range fork (Cast #41816) is engineered to meet the high standards and...
    $74.99
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  • NP271 NP273 TRANSFER CASE CHAIN NP271 NP273 TRANSFER CASE CHAIN

    NP271 NP273 TRANSFER CASE CHAIN

    Crafted with precision and superior quality, the NP271 NP273 Transfer Case Chain is the ultimate solution for your vehicle's needs. This high-quality chain, also known as HV064, is designed to meet and exceed the performance standards required for NP271...
    $249.99
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  • CPP NP271 / NP273 OIL PUMP ASSEMBLY

    CPP NP271 / NP273 OIL PUMP ASSEMBLY

    The NP271 / NP273 Oil Pump Assembly is a critical component designed specifically for NP271 and NP273 transfer cases, offering reliable performance and durability. This oil pump assembly is expertly crafted to fit Ford and Dodge models, ensuring...
    $179.99
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  • NP271 / NP273 POCKET BEARING

    NP271 / NP273 POCKET BEARING

    The NP271/NP273 Pocket Bearing is a high-quality product designed to meet the transfer case needs of 1999-up Ford and Dodge vehicles. Specifically engineered to fit seamlessly into these models, this pocket bearing ensures optimal performance and...
    $39.99
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  • CPP NP271 NP273 DRIVE AND DRIVEN SPROCKET CPP NP271 NP273 DRIVE AND DRIVEN SPROCKET

    CPP NP271 NP273 DRIVE AND DRIVEN SPROCKET

    The NP271 and NP273 Drive & Driven Sprockets, part number 21966, are essential components designed to support the smooth operation of your vehicle's transfer case. These high-quality sprockets are built to withstand the rigors of off-road driving,...
    $89.99
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  • NP271 / NP273 TRANSFER CASE SEAL AND GASKET KIT NP271 / NP273 TRANSFER CASE SEAL AND GASKET KIT

    NP271 / NP273 TRANSFER CASE SEAL AND GASKET KIT

    The NP271/NP273 Transfer Case Seal and Gasket Kit is a comprehensive solution designed to meet the needs of automotive enthusiasts and professionals alike. This kit includes high-quality seals and gaskets specifically engineered for the NP271 and NP273...
    $99.99
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  • CPP NP241DHD RANGE SLIDER TUBE 2 PIECE DESIGN

    CPP NP241DHD RANGE SLIDER TUBE 2 PIECE DESIGN

    The NP241DHD Range Slider Tube features a sturdy 2-piece design that is specifically engineered to deliver reliable performance for your NP 241DHD transfer case. This premium-quality component, part number 17521, is designed to meet the demands of...
    $83.99
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  • CPP NP241 RANGE FORK BUSHINGS

    CPP NP241 RANGE FORK BUSHINGS

    The NP241 Range Fork Bushings are essential components designed to enhance the efficiency and performance of your transmission system. Crafted with precision and durability in mind, these bushings provide a seamless connection between the range fork and...
    $19.99
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  • NP241, NP271 TRANSFER CASE PUMP SCREEN

    NP241, NP271 TRANSFER CASE PUMP SCREEN

    The NP241, NP271 Transfer Case Pump Screen is a vital component designed to fit seamlessly into NP241 and NP271 transfer cases. This oil screen serves a crucial function in the efficient operation of transfer cases, ensuring that contaminants and debris...
    $27.99
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  • CPP NP241 MODE FORK WITH RAIL

    CPP NP241 MODE FORK WITH RAIL

    Crafted with precision and durability in mind, the NP241 Mode Fork with Rail is a top-of-the-line product designed to enhance the performance of your vehicle. This premium-quality NP241 Mode Fork (DHD) with Rail is the perfect solution for those seeking...
    $83.99
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  • CPP NP241 INPUT SHAFT AUTO, 23 SPLINE

    CPP NP241 INPUT SHAFT AUTO, 23 SPLINE

    The NP241 Input Shaft Auto with 23 Spline is a high-quality and durable product designed specifically for Dodge vehicles. This input shaft boasts 23 splines, providing a reliable and precise connection within the transmission system. With a width of .630...
    $189.99
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  • CPP NP241 INPUT SHAFT DODGE 29 SPLINE

    CPP NP241 INPUT SHAFT DODGE 29 SPLINE

    Enhance the durability and efficiency of your Dodge transfer case with the NP241 Input Shaft (29 Spline). Designed to meet the rugged demands of off-road adventurers, this high-quality input shaft is engineered for precise fit and exceptional performance...
    $163.99
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  • NP271 NP273 EXTENSION HOUSING BUSHING

    NP271 NP273 EXTENSION HOUSING BUSHING

    The NP271 NP273 Extension Housing Bushing (Dodge) 45379 is a high-quality replacement part designed to provide durability and reliability in your vehicle's transfer case assembly. This extension housing bushing is specifically crafted for use in Dodge...
    $27.99
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  • CPP NP241 INPUT SHAFT POCKET BEARING

    CPP NP241 INPUT SHAFT POCKET BEARING

    The NP241 Input Shaft Pocket Bearing is a crucial component designed to enhance the performance and durability of your vehicle's transfer case. Specifically engineered for the NP 241DHD model, this needle-type pocket bearing functions as a key link...
    $23.99
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  • CPP NP241 TRANSFER CASE SMALL PARTS KIT

    CPP NP241 TRANSFER CASE SMALL PARTS KIT

    The NP241 Transfer Case Small Parts Kit is a must-have accessory for any automotive enthusiast or professional mechanic looking to maintain or repair their transfer case. Crafted with precision and durability in mind, this kit includes all the necessary...
    $64.99
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  • CPP NP241 RANGE COLLAR SNAP RING

    CPP NP241 RANGE COLLAR SNAP RING

    The NP241 RANGE COLLAR SNAP RING is a crucial component designed to ensure the smooth and efficient operation of your vehicle's transfer case. This high-quality snap ring is specifically crafted for NP241DHD transfer cases with a 2-piece design, offering...
    $16.99
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  • CPP NP241DHD MAIN SHAFT 31 SPLINE

    CPP NP241DHD MAIN SHAFT 31 SPLINE

    The NP241DHD Mainshaft 31 Spline with Speedo Drive is a top-quality replacement part designed to meet the needs of your vehicle. This mainshaft is a perfect fit for your NP241 DHD transfer case and features 31 splines for optimal performance and...
    $439.00
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  • CPP NP241 DHD MODE DRIVE SPROCKET 1-3/8 WIDE

    CPP NP241 DHD MODE DRIVE SPROCKET 1-3/8 WIDE

    The NP241 DHD Mode Drive Sprocket 1-3/8 Wide, part number 16066, is a reliable and essential component for your vehicle's transmission system. This sprocket is a high-quality replacement part that ensures smooth and efficient power transfer within your...
    $149.99
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