Tier One's Stage 2 48RE Transmission Features:
- Built 48RE transmission that can handle mild to moderate tuning, heavy towing, and tough off-roading
- Handles up to 450 horsepower from mid-level tuning and bolt-on performance parts
- Complete, drop-in transmission for 2005-2007 Ram 5.9L Cummins trucks
- Includes a billet flex plate, billet single-disc torque converter, billet 2nd gear servo, billet accumulator, billet band strut, billet band anchor, billet 4.2 band lever, high pressure valve body, deep transmission pan, performance rebuild kit, heavy-duty governor solenoid, and heavy-duty transducer
- Fixes common 48RE transmission issues while allowing your Cummins to reliably make more power and torque
- A great choice for aggressive street builds, off-road rigs, heavy towing, and near-stock sled pulling
- Black finish for a great look under your truck
- Valve bodies are both leak-checked and dyno-tested before installation
- All transmissions are thoroughly tested on our in-house transmission dyno
- Comes backed by a 2-year, unlimited mileage warranty
- Requires additional core charge and freight shipping
- If you have questions or want a custom 48RE build, contact Tier One or call 602-399-5484!
Built 48RE for 5.9L Cummins Rams Looking to Add Power, Tow Heavy, or Rip Off-Road on Big Tires
The 5.9L Cummins powering your 2005-2007 Ram 2500 or 3500 can make a ton of extra power and torque with even the most basic of tuning and bolt-on power-adders, but the stock Chrysler 48RE transmission won't be happy about it. Tier One's Stage 2 48RE Transmission was specifically designed to handle mild to moderate 5.9L Cummins tuning, as well as heavy towing and tough off-road use without letting you down. Each Stage 2 48RE transmission can handle up to 450 horsepower, allowing you to use preloaded tunes and bolt-on performance parts to hit higher levels of horsepower and torque than the stock 48RE transmissions can handle. The Stage 2 48RE transmission from Tier One can also handle heavy towing applications, off-road crawling and mud-bogging, and milder levels of competition use at the local sled pull. On top of being able to handle more horsepower, Tier One's Stage 2 48RE Transmissions come with parts and components that address key problem areas in the 48RE transmissions so that your Ram 2500 or 3500 gets reliable operation, no matter how hard your push it on the street or out in the dirt. This complete 48RE transmission drops right into place of the stock transmission without the need for any tuning or other permanent modifications.
Features a Range of Billet 48RE Transmission Parts that Increase Strength, Power-Holding, and Reliability
We here at Tier One build each of our Stage 2 48RE Transmissions using high-quality components that won't let you our your Cummins Ram down when you need it most. Starting outside of the transmission, Tier One includes a billet flex plate and billet single-disc torque converter that hold more power than stock and are more resistant to warping and burn-up under load from extra power or during heavy towing. The second gear band of the stock 48REs is a notable weak point in the stock 48RE transmissions, and to address it, we include a billet 2nd gear band strut, billet 2nd gear band anchor, and a billet 4.2 lever that all work together to prevent the 2nd gear band from warping under load and get enough leverage to shift properly. Each Stage 2 48RE transmission comes with a billet 2nd gear servo that includes Viton sealing rings instead of steel to both help prevent leaks and give the transmission extra strength and reliability. The Stage 2 48RE comes standard with a Tier One high-pressure valve body that can handle higher line pressures than stock to ensure transmission fluid is being fed throughout the Stage 2 48RE under high levels of load. Tier One includes both a heavy-duty governor solenoid and a heavy-duty transducer to replace the weak factory versions to improve reliability. Each Stage 2 comes with a deep transmission pan with increased fluid capacity over stock to help keep the transmission cool. We include a Performance Rebuild Kit with each Stage 2 48RE transmission that includes 6 overdrive clutches and 6 direct clutches, as well as corresponding hardware and seals. The Stage 2 transmission is topped off with new seals and gaskets before being air-checked for potential leaks.
Fully Overhauled 48RE Transmission for Excellent Reliability
During our build of your 48RE Stage 2 transmission, we here at Tier One go over every millimeter of its internal components to guarantee excellent function and reliability. All parts are disassembled and cleaned from our OEM cores to ensure your new 48RE transmission is free from contaminants and other debris. We carefully inspect your transmission’s planetary gear train for damage before fully speccing all bearings and washers for endplay. The original transmission pump gets a cut stator, and is then checked for proper clearances. The valve body is likewise flat-sanded and its solenoids thoroughly inspected for better than OEM function. The performance rebuild kit includes new Borg Warner clutches, seals, gaskets, and sealing rings to replace all the wearable parts of the transmission before it’s installed on your Ram 2500 or Ram 3500.
Thorough Testing of the Valve Body and Entire Transmission Before Shipping
We here at Tier One take pride in every built 48RE transmission we manufacture for the Ram 5.9L Cummins trucks. To make sure that you get a transmission that’s as tough as your truck, Tier One puts both the valve bodies and the entire assembled transmission through rigorous testing to ensure you get the reliability you need for heavy towing and hauling applications with your 5.9L Cummins diesel. Once the valve body has been assembled, it’s air-checked for leaks before being put on our in-house valve body dyno to ensure proper fluid flow and pressure management. After final assembly of the transmission itself, we put it through a complete air-check to find potential leaks before putting the entire transmission on our in-house transmission dyno to ensure proper operation, performance, and power-holding.
Specifications:
- Vehicle Fitment: 2005-2007 Ram 5.9L Cummins 2500 & 3500
- Transmission Type: Chrysler 48RE
- Power Rating: Up to 450 horsepower
- Torque Converter: Billet single-disc
- Flex Plate: Billet Steel
- Input Shaft: OEM
- Transmission Pan: Deep pan with increased capacity
- Valve Body: High-Pressure
- Intermediate Shaft: OEM
- Clutches: Borg Warner Performance Rebuild Kit
- Output Shaft: OEM
- Geartrain: OEM
- 2nd Gear Band: OEM
- 2nd Gear Servo: Billet Aluminum
- Band Strut: Billet Steel 2nd Gear Band Strut
- Band Anchor: Billet Steel 2nd Gear Band Anchor
- Band Lever: 4.2 Billet Steel Band Lever
- Accumulator: Billet Aluminum
For 2005-2007 Ram 5.9L Cummins only: this transmission will only fit 2005-2007 Ram 5.9L Cummins trucks. A
2004 Ram 5.9L Cummins Stage 2 48RE Transmission and
2003 Ram 5.9L Cummins Stage 2 48RE Transmission are also available. If you have an older Ram with a 47RE transmission, please see all of our
48RE and 47RE Transmissions.
2007 Ram Model Year Note: if you have a 2007.5 Ram 6.7L Cummins built after July 2007, this transmission will not fit your truck. Please see our
2007.5-2018 Ram 6.7L Cummins Stage 2 68RFE Transmission.
2-Year, Unlimited Mile Warranty: each Tier One built transmission comes backed by a 2-year, unlimited mile warranty. Please see our
Warranty Terms and Conditions here.
Recommended gearing: the following gearing is recommended for the following tire sizes, and is required for Tier One to honor your warranty:
- 35" Tire: 3.73 gears or higher
- 37" Tire: 4.10 gears or higher
- +38" Tire: 4.56 gears or higher
Core charge: this transmission includes a $2000.00 core charge that will be refunded upon receipt of your stock transmission. For more information and/or instructions for sending in a core, call 602-399-5484.
Freight Shipping: this transmission ships via freight. Please carefully inspect your transmission before signing your Bill of Lading. If your transmission arrives damaged, please call us directly at 602-399-5484.