{"product_id":"tier-one-1000hp-competition-48re-transmission-todt1-48-c-03-x-2003-5-9l-cummins","title":"Tier One +1000HP Competition 48RE Transmission TODT1-48-C-03-X | 2003 5.9L Cummins","description":"\u003cp\u003eBuild your 2003 Dodge Ram 2500 or 3500 5.9L Cummins for serious competition with the Tier One Competition 48RE Built Transmission. Engineered for drag racing, dyno competitions, and extreme horsepower applications, this fully built transmission features extensive billet upgrades, increased clutch capacity, and reinforced internal components designed to withstand demanding performance conditions.\u003c\/p\u003e\n\n\u003cp\u003eRated by Tier One to handle \u003cstrong\u003eover 1,000 horsepower\u003c\/strong\u003e, the Competition 48RE is designed for heavily modified Cummins engines equipped with large turbocharger systems, upgraded fuel injectors, and other high-performance modifications. The transmission replaces common factory weak points with high-strength components to provide increased power-holding capability and durability.\u003c\/p\u003e\n\n\u003cp\u003eAt the center of the build is a \u003cstrong\u003eSunCoast 35-Spline Billet Triple-Disc Torque Converter\u003c\/strong\u003e paired with an oversized 35-spline billet input shaft and TCS billet intermediate shaft. A billet 23-spline output shaft comes standard, with an optional 29-spline output shaft available for additional strength.\u003c\/p\u003e\n\n\u003cp\u003eThe transmission also features a high-pressure race valve body, upgraded billet second-gear band components, TIG-welded ring gears, PTFE-coated thrust washers, and a reinforced three-bolt sprag. Increased clutch capacity includes seven direct clutches, six overdrive clutches, and five forward clutches to provide additional holding power under extreme loads.\u003c\/p\u003e\n\n\u003cp\u003eEach transmission is fully disassembled, cleaned, inspected, and rebuilt with upgraded internal components, new electronics, seals, gaskets, and a performance rebuild kit. The valve body and completed transmission undergo air-pressure testing and inspection before shipping.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e This is a competition-focused transmission designed for extremely firm, quick shifts. It is not intended to provide factory-like shift comfort.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOver 1,000 HP Capability\u003c\/strong\u003e – Manufacturer-rated for extreme horsepower competition applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Competition Transmission\u003c\/strong\u003e – Fully built replacement assembly for compatible 2003 Ram 5.9L Cummins trucks\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSunCoast Billet Triple-Disc Torque Converter\u003c\/strong\u003e – 35-spline design engineered for increased torque capacity\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversized 35-Spline Billet Input Shaft\u003c\/strong\u003e – Provides additional strength over factory components\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTCS Billet Intermediate Shaft\u003c\/strong\u003e – Upgraded shaft construction for high-load applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBillet Output Shaft\u003c\/strong\u003e – Includes a 23-spline billet output with an optional 29-spline configuration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Pressure Race Valve Body\u003c\/strong\u003e – Designed for increased line pressure and quick, firm shifting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptional Fully Manual Valve Body\u003c\/strong\u003e – Available for applications requiring manual shift control\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBillet Second-Gear Band Components\u003c\/strong\u003e – Includes upgraded band, strut, anchor, servo, and 4.2 lever\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncreased Clutch Capacity\u003c\/strong\u003e – Features seven direct, six overdrive, and five forward clutches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBillet Internal Components\u003c\/strong\u003e – Includes upgraded pistons, clutch drum, clutch retainer, accumulator, and Belleville spring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTIG-Welded Ring Gears\u003c\/strong\u003e – Reinforced geartrain with optional rollerized planetary gears\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePTFE-Coated Thrust Washers\u003c\/strong\u003e – Designed to improve durability under high loads\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUpgraded Three-Bolt Sprag\u003c\/strong\u003e – Provides increased durability compared to the factory design\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeep Transmission Pan\u003c\/strong\u003e – Increased fluid capacity supports additional transmission cooling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNew OEM Electronics\u003c\/strong\u003e – Included during the rebuild process\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThoroughly Inspected and Tested\u003c\/strong\u003e – Valve body and completed transmission undergo air-pressure testing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlack Exterior Finish\u003c\/strong\u003e – Provides a clean, finished appearance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2-Year\/Unlimited-Mileage Warranty\u003c\/strong\u003e – Subject to Tier One warranty terms and conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUpgraded Components\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSunCoast 35-Spline Billet Triple-Disc Torque Converter\u003c\/li\u003e\n  \u003cli\u003eOversized 35-Spline Billet Input Shaft\u003c\/li\u003e\n  \u003cli\u003eTCS Billet Intermediate Shaft\u003c\/li\u003e\n  \u003cli\u003e23-Spline Billet Output Shaft (Optional 29-Spline)\u003c\/li\u003e\n  \u003cli\u003eHigh-Pressure Race Valve Body (Optional Fully Manual Valve Body)\u003c\/li\u003e\n  \u003cli\u003eBillet Second-Gear Band\u003c\/li\u003e\n  \u003cli\u003eBillet Second-Gear Band Strut\u003c\/li\u003e\n  \u003cli\u003eBillet Second-Gear Band Anchor\u003c\/li\u003e\n  \u003cli\u003eBillet Second-Gear Servo\u003c\/li\u003e\n  \u003cli\u003eBillet 4.2 Band Lever\u003c\/li\u003e\n  \u003cli\u003eBillet Accumulator\u003c\/li\u003e\n  \u003cli\u003eBillet Belleville Spring\u003c\/li\u003e\n  \u003cli\u003eBillet Forward Piston\u003c\/li\u003e\n  \u003cli\u003eBillet Direct Drum and Piston\u003c\/li\u003e\n  \u003cli\u003eBillet Forward Clutch Retainer\u003c\/li\u003e\n  \u003cli\u003eUpgraded Three-Bolt Sprag\u003c\/li\u003e\n  \u003cli\u003eTIG-Welded Ring Gears\u003c\/li\u003e\n  \u003cli\u003ePTFE-Coated Thrust Washers\u003c\/li\u003e\n  \u003cli\u003e7 Direct Clutches with Custom Plate\u003c\/li\u003e\n  \u003cli\u003e6 Overdrive Clutches with Custom Plate\u003c\/li\u003e\n  \u003cli\u003e5 Forward Clutches\u003c\/li\u003e\n  \u003cli\u003eMachined Transmission Pump Stator\u003c\/li\u003e\n  \u003cli\u003eNew OEM Electronics\u003c\/li\u003e\n  \u003cli\u003eDeep Transmission Pan\u003c\/li\u003e\n  \u003cli\u003ePerformance Rebuild Kit with New Clutches, Seals, Gaskets, and Sealing Rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmission Model:\u003c\/strong\u003e Chrysler 48RE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmission Type:\u003c\/strong\u003e 4-Speed Automatic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuild Level:\u003c\/strong\u003e Competition\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Rating:\u003c\/strong\u003e Over 1,000 HP\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTorque Converter:\u003c\/strong\u003e SunCoast 35-Spline Billet Triple-Disc\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Shaft:\u003c\/strong\u003e Oversized 35-Spline Billet Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntermediate Shaft:\u003c\/strong\u003e TCS Billet Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Shaft:\u003c\/strong\u003e 23-Spline Billet Steel (Optional 29-Spline)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValve Body:\u003c\/strong\u003e High-Pressure Race (Optional Fully Manual)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Clutches:\u003c\/strong\u003e 7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverdrive Clutches:\u003c\/strong\u003e 6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eForward Clutches:\u003c\/strong\u003e 5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGeartrain:\u003c\/strong\u003e TIG-Welded OEM Gears (Optional Rollerized Planetaries)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecond-Gear Band:\u003c\/strong\u003e Billet Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBand Lever:\u003c\/strong\u003e Billet Steel 4.2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccumulator:\u003c\/strong\u003e Billet Aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePistons:\u003c\/strong\u003e Billet Forward and Direct\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClutch Drum:\u003c\/strong\u003e Billet Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClutch Retainer:\u003c\/strong\u003e Billet Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSprag:\u003c\/strong\u003e Upgraded Three-Bolt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThrust Washers:\u003c\/strong\u003e PTFE Coated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmission Pan:\u003c\/strong\u003e Deep Pan with Increased Capacity\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShift Characteristics:\u003c\/strong\u003e Extremely Firm, Competition-Oriented\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2 Years \/ Unlimited Mileage\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCore Charge:\u003c\/strong\u003e $2,500\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShipping Method:\u003c\/strong\u003e Freight\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003 Dodge Ram 2500 5.9L Cummins with 48RE Transmission\u003c\/li\u003e\n  \u003cli\u003e2003 Dodge Ram 3500 5.9L Cummins with 48RE Transmission\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRequired Gear Ratios\u003c\/h3\u003e\n\u003cp\u003eTier One specifies the following axle gear ratios based on tire size to maintain warranty eligibility:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e35\" Tires:\u003c\/strong\u003e 3.73 or Numerically Higher\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e37\" Tires:\u003c\/strong\u003e 4.10 or Numerically Higher\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLarger Than 38\" Tires:\u003c\/strong\u003e 4.56 or Numerically Higher\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Application Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2003 Model Year Only:\u003c\/strong\u003e Designed specifically for 2003 Dodge Ram 2500 and 3500 trucks equipped with the 5.9L Cummins and compatible 48RE transmission.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompetition Shift Characteristics:\u003c\/strong\u003e This transmission produces extremely firm, quick shifts. Aftermarket traction bars may help reduce the effects of harsh shifting.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBillet Flexplate Recommended:\u003c\/strong\u003e Tier One strongly recommends upgrading to a billet flexplate if the vehicle is not already equipped with one.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptional 29-Spline Output Shaft:\u003c\/strong\u003e Four-wheel-drive applications require a custom 29-spline transfer case input. Rear-wheel-drive applications require a custom driveshaft.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdditional Driveline Upgrades:\u003c\/strong\u003e Tier One recommends the SunCoast 618 Stubby Kit, heavy-duty U-joints, and upgraded slip yokes for applicable 29-spline output configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCore Charge:\u003c\/strong\u003e A $2,500 refundable core charge applies. Refund eligibility depends on the condition and acceptance of the returned transmission. Advance core returns may reduce or eliminate the charge.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFreight Shipping:\u003c\/strong\u003e This transmission ships via freight. Inspect the shipment for damage before signing the Bill of Lading and document any damage with the carrier.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty Requirements:\u003c\/strong\u003e Tire size, axle gearing, installation procedures, and other manufacturer conditions may affect warranty eligibility.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfessional Installation Recommended:\u003c\/strong\u003e Installation should be completed by a qualified transmission technician familiar with high-performance 48RE applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2003 Dodge Ram 2500 \u0026amp; 3500 5.9L Cummins with 48RE Transmission\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Tier One Transmissions\u003c\/p\u003e","brand":"Tier One Transmissions","offers":[{"title":"Default Title","offer_id":54573423231259,"sku":"TODT1-48-C-03-X","price":12999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/Screenshot2026-11-09at4.04.50PM.png?v=1794265601","url":"https:\/\/wwmperformance.com\/products\/tier-one-1000hp-competition-48re-transmission-todt1-48-c-03-x-2003-5-9l-cummins","provider":"WWM Performance","version":"1.0","type":"link"}