Automatic Transmission Builds
At RedLine Transmissions, we specialize in building strong and reliable Chrysler 68RFE, 48RE, 47RE, and Allison 1000 diesel performance transmissions. Our transmission builds are designed to withstand hard work, play, towing, and high horsepower. At the end of the day, RedLine builds it better.
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Diesel Automatic Transmissions
Stock transmissions are known to FAIL! They were not designed to handle extra power or very hard work. How do we know that? Our stock unit failed on us too. Our transmission builds were created out of necessity. They are designed to withstand work, play, towing, and horsepower. Shop all of 07.5-18 and 19-ON 68RFE, 48RE, 47RE, 47RH, and Allison 1000 transmission builds.
Diesel Performance Parts & Upgrades
We understand that diesel enthusiasts have diverse needs, from daily driving and heavy towing to exhilarating drag racing and competitive truck pulling. That’s why we offer an extensive range of products, including cold air intakes, turbochargers, twin turbo kits, and 48-state legal tuners, carefully selected from the industry’s best brands.
RAM 2500/3500 Transmission Parts
From Valvebodies to Billet Heavy Duty Output Shafts, Front Pumps, Billet Flex Plates, and Torque Converters, our products are the result of rigorous testing and real-world experience. We don’t just sell these parts; we use them in our own transmission builds to ensure they stand up to the toughest challenges. When it comes to transmission parts, we’re committed to doing whatever it takes to keep your Dodge Ram Cummins Transmission running smoothly and reliably.
Experience-Built Automatic Transmissions
With nearly 25 years in the industry, we KNOW Cummins and Duramax transmissions. We build performance transmissions for Dodge RAM 68RFE, 48RE, and 47RE, as well as Chevy Allison 1000/2000. Our diesel transmissions are custom-built in-house with QUALITY USA parts, designed for longevity, with the added benefits of power and performance.
Automatic Transmission Upgrades
You Can Count On
At RedLine Transmissions, getting the right build is simple. Tell us about your truck, and we’ll recommend the perfect transmission. We can ship nationwide or install in-house at our Medina, Ohio shop. Fill out our quick form today to get your custom estimate and drive with RedLine.
Confident in the build you need? Skip the form—purchase online now and we’ll start building your transmission for fast shipping
we build it better
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Start with the basics—year, make, model, engine size, and what you use it for (daily driving, towing, racing, or a mix). This gives us the foundation to match the right build to your application.
Choose
Decide how much horsepower/torque you’re working with (or plan to) and what you need the truck to handle—moderate towing, heavy hauling, or high-performance driving. This helps us recommend the build tier that fits your goals and budget.
Build
We put it all together and recommend the best RedLine build for your truck. You’ll know exactly what parts, upgrades, and performance level you’re getting—no guesswork, no hassle. We can ship your transmission to you, or install it at our shop.
Tech Talk
Helpful information, advise and knowledge for the experts about automatic diesel transmissions and performance upgrades. If is has horsepower or you want to add more horsepower, this is the place for you.
2018 RAM 2500
68RFE Transmission - "The 550"
Solid Transmission Build!
"Have had a RedLine Transmission in my truck for 1,200 miles. Transmission is very solid and you can feel the transmission holding on to the gears longer while in use. Another big plus is that they had my truck in and out in five days. This is great because my truck is a daily driver and tow rig. 100% recommend this company. Can't wait to tow the fifth wheel this summer.
- Tim B.
2002 Dodge Ram 2000
47RE Transmission - "The 650"
Built & Shipped!
I purchased a built 47RE Transmission for my Ram pickup and it has been driving beautifully so far. Amazing customer service, great product and a pleasure to work with. Definitely recommend!
- Deagan O.
2016 Ram 2500
68RFE Transmission - "The 700"
Highly Recommended
"Had by 2016 68RFE rebuilt at RedLine. Nothing but good things to say. They are priced right. It's been 8 months and 10,000 miles and it is running super strong with no issues. Highly recommended!
- Aris A.
2020 RAM 2500
68RFE Transmission - "The 550"
Nothing but the best!
Quality of the work and the service you receive. Worth it to check them out and get your work done.
- Steve Z.
Transmissions
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