48RE Transmission Stage 1 400HP Max

Randy’s Stage 1 48RE Transmission – Your Reliable Upgrade for the Common Rail 5.9 Cummins

For those Dodge Cummins owners who’ve made minor upgrades or just need more durability than stock, the Stage 1 48RE Transmission offers an ideal solution. It’s perfect for those looking to add extra strength and reliability without the need to return to stock components, handling up to 400 HP. This transmission is a great solution for the daily driver or the weekend warrior that wants to drag the trailer to the campsite for some relaxation.

Transmission Specs: 

 • Sonnax Heavy Duty Direct Drum Piston: Reinforces the transmission’s durability and reliability under added stress.
 • Randy’s Single Disc Billet Torque Converter: Built in-house for precise performance and strength, ensuring smooth power transfer.
 • Alto G3 Clutches & Steels: Upgraded clutches and steels provide extra holding power, boosting your truck’s towing and driving capabilities.
 • Alto G3 Power-Packed Overdrive: Enhances the overdrive section to handle more power and improve efficiency.
 • High Pressure Valve Body: Built in-house for improved shifting performance, providing enhanced control under load.
 • Billet Band Strut & Billet Accumulator: Increases the strength and responsiveness of the transmission, ensuring long-term durability.
 • Heavy Duty Flexband: Designed for enhanced longevity and performance under heavy loads.
 • Borg Warner Governor Pressure Solenoid: Ensures accurate pressure control for consistent and reliable shifting.
 • High Pressure Transducer: Monitors and regulates pressure levels for stable performance.

Featuring Alto G3 Clutches & Steels 

The Alto G3 line has a long-standing reputation for its strength and reliability in transmission builds. Developed to withstand extreme demands, G3 frictions have become the gold standard for builders who demand durability and consistent performance.

Recognizing the need for a tough, long-lasting transmission solution, we teamed up with Alto to bring a full clutch and steel lineup specifically designed for the 47RE & 48RE. Built with the same trusted G3 technology, this lineup offers unmatched resilience, ensuring your transmission can handle anything you throw at it—whether it’s the heavy demands of towing or the rigors of track racing.

This collaboration between Randy’s and Alto guarantees that your 48RE gets the best in performance, tested and proven under real-world conditions.

Backed by Real-World Testing and Proven Expertise

Since 2008, we have mastered the 48RE transmission. Through years of hands-on experience, we’ve fine-tuned our builds to deliver unmatched durability and performance. When it comes to the 48RE, nobody else comes close.

Our very own Red Delicious (2006 Cummins Dually) started with stock power, but out of a desire to find and eliminate every weak point, we steadily increased its power. Each stage of development allowed us to identify and address vulnerabilities, resulting in a transmission built to withstand anything you can throw at it. Our real-world testing ensures that every transmission we produce is battle-tested and ready for the road or track.

Buy Now, Pay Later

We know that upgrading your transmission is a big investment and paying all at once can be tough. That’s why we’ve teamed up with Affirm to make it easier for you. With our financing options, you can enjoy the benefits of a top-quality transmission without the stress of a hefty upfront payment. Available exclusively online, just choose Affirm at checkout and spread your payments out over time. Get the performance you need today, and pay at a pace that fits your budget.

2-Year / Unlimited Mile Warranty

At Randy’s, we back our products with a robust 2-year, unlimited mile warranty because we believe in the quality and reliability of our transmissions. Our commitment goes beyond just selling a product; it’s about providing peace of mind for the long haul. If you encounter any issues during this period, we’ll be there to support you, ensuring your transmission performs at its best. This warranty reflects our dedication to your satisfaction and confidence in our craftsmanship. Rest assured, with Randy’s, you’re covered.

Refresh Program

At Randy’s, we believe in long-term relationships, not just one-time transactions. That’s why our Refresh Program is here to support you even after your warranty expires. When your transmission needs a little TLC, we’ll give it a thorough rebuild at a fraction of the cost of a new unit. It’s our way of showing our commitment to your vehicle’s performance and your satisfaction. Please remember, this program is available only to the original owner and is non-transferable. With Randy’s, you’re not just buying a transmission; you’re investing in lasting peace of mind and continued excellence on the road.