Randy’s Transmissions, one of the most respected names in diesel drivetrain durability, is entering a new era—one marked by major national expansion, a dramatically scaled-up manufacturing footprint, and the addition of industry veteran Frank Kuperman Jr. as part owner. For diesel performance enthusiasts who follow the companies shaping the market, this move signals a surge of innovation and availability that’s been building for years.
From Backyard Shed To International Reputation
The story of Randy’s Transmissions begins in 2008 inside a modest shed behind founder Randy Reyes’ home in Grantsville, Utah. Demand came fast. Within a short time, that shed turned into a 900 sq. ft. two-bay shop, and the word began to spread throughout the Intermountain West that Randy was addressing real-world transmission failures that diesel pickup owners were experiencing every day.
From the start, Randy built transmissions around the realities of diesel life—not ideal laboratory conditions. His personal test mule, Red Delicious, endured drag strip passes, cross-country towing, dyno torture, sled pulls, and more off-road abuse than most test trucks ever see. Everything he learned translated into stronger builds, and the failures that surfaced helped manufacturers develop more durable components. That feedback loop not only refined Randy’s craftsmanship, it quietly influenced the entire aftermarket’s approach to high-load, high-torque transmissions.
As Randy’s reputation grew, so did the reach of the company. A nationwide dealer and installer network emerged, giving shops throughout the U.S. and Canada the ability to sell and service Randy’s-built transmissions while offering customers faster turnaround and local support. For working truck owners—especially those who rely on their vehicle to make a living—this meant less downtime and more reliable solutions.
By the mid-2010s, the company was shipping transmissions and parts around the world. Australia, the U.K., Iceland, Germany, Africa—wherever diesel trucks were pushing their limits, Randy’s Transmissions was helping keep them alive.
Building Capabilities And Bringing Manufacturing In-House
Growth accelerated even more in 2018 when Randy’s moved into a larger Tooele, Utah facility. Four years later, torque converter manufacturing came in-house, giving the company tighter control over quality and allowing for rapid development. By 2024, converter production needed its own dedicated building, and the parts division was expanding just as quickly. Randy’s Transmissions was no longer simply a high-performance builder—it was becoming a full-scale engineering and manufacturing operation.
A Major Addition To Leadership: Frank Kuperman Jr. Joins The Team
The next evolution came with Randy approaching Frank Kuperman Jr., a widely respected leader with more than 26 years in the automatic transmission and performance aftermarket. The two had already begun collaborating on cooling system innovation through Frank’s company, Fluidyne High Performance. Their shared philosophy—solve real problems with real engineering—made a long-term partnership feel like a natural fit.
Frank’s background reads like a greatest-hits list of drivetrain leadership. He previously served as CEO of TransGo, Transmission Specialties, and RevMax, and most recently held the role of President at Race Winning Brands. He’s well known among diesel enthusiasts for engineering some of the most impactful 68RFE upgrades on the market, including the billet channel plate and the high-performance input clutch drums that corrected longstanding OEM weaknesses.
Meanwhile, Fluidyne has long been a respected name in professional motorsports cooling, including NASCAR. In late 2024, Fluidyne and Randy’s released a new line of high-capacity, high-efficiency transmission coolers built specifically for diesel pickups—an early example of what their combined engineering capabilities can produce.
Frank summed up his return to the diesel aftermarket with a grin and a promise:
“I’m fired up to be back in the game and ready to bring a whole lot of badass products to the market. We’re not easing in — we’re coming in swinging.”
Two New Facilities And A Nationwide Footprint
To support the surge in product development and manufacturing, Randy’s Transmissions has acquired a new 40,000 square-foot headquarters in West Valley City, Utah. This facility will reunite transmission and torque converter production under one roof, dramatically increase capacity, and serve as the West Coast distribution hub for Fluidyne cooling systems. It also gives the company the space to expand engineering, R&D, and product development for the next generation of drivetrain components.
On the opposite side of the country, a 20,000 square-foot manufacturing and distribution center in Charlotte, North Carolina is set to open January 5, 2026. This location will provide additional support for transmission and valve body production while boosting order fulfillment, parts availability, and warranty service. With both facilities operating in tandem, Randy’s and Fluidyne will be able to offer two-day shipping coverage to most of the United States.
A Wave Of New Products On The Horizon
With expanded engineering resources and two production centers feeding the market, Randy’s and Fluidyne are preparing to roll out an impressive lineup of new products. Among the highlights are a patent-pending two-piece billet output shaft for the 68RFE, a reusable billet cartridge-style spin-on filter system for the same platform, a new family of input drums with expanded clutch capacity options, and injection-molded deep transmission pans engineered for improved fluid control and durability.
Beyond the 68RFE, the companies are also finalizing new hard parts for the Aisin AS69RC, billet upgrades for the next-generation 8AP “Powerline” transmissions in 2025 Ram 6.7 Cummins trucks, and a billet torque converter designed specifically for that platform. They’re also collaborating with some of the top diesel performance shops in the country to launch a new high-performance radiator lineup in early 2026.
Integrity, Innovation, And Commitment To The Customer
For Randy, the partnership with Frank is more than a business move. It’s a way to elevate the industry he’s been devoted to since that first backyard shop.
“I’ve always dreamed of bringing integrity and innovation to this industry; and now we can accomplish these things as a team,” he said, reflecting on the new chapter.
He also made sure to acknowledge the customers who’ve supported the company from day one. “I know how hard people work for their money, and it’s not something that I take lightly. I am grateful for all of our customers who have put their trust in us throughout these years; we will never take you for granted.”
A Turning Point For Diesel Performance
As Randy’s Transmissions and Fluidyne push into this next phase—expanding coast to coast, scaling production, and accelerating innovation—the diesel market stands to benefit in a very real way. More availability, more engineering, more problem-solving, and more durability where it matters most.
For enthusiasts, racers, and the working trucks that keep America moving, Randy’s isn’t just growing. It’s gearing up to deliver solutions at a scale the company has never attempted before.
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