Need the Best Remanufactured Transmissions?
We’ve Got You Covered

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Helping Auto Repair Shops
Like Yours Thrive

You don’t have to rebuild transmissions in house – there may be a better way. Here at Ace Transmission, we produce thousands of high-quality remanufactured transmissions, each year, right here in the American heartland. With hundreds of units in stock, the one you need usually ships the same day. And we stand behind our work with an amazing nationwide warranty. Increase your shop’s productivity and profits by becoming a wholesale buyer today.

What is a “remanufactured transmission”?
Why choose ACE?

Remanufactured vs rebuilt transmissions

A mechanic smiling in an auto repair shop.

Does your shop still rebuild transmissions one by one?
You can increase productivity and profits by doing things differently.

  • What is the difference between rebuilt transmissions and remanufactured transmissions?
  • Why is rebuilding transmissions slower and less profitable?
  • How can remanufactured transmissions bring higher profits to your repair shop?
  • What’s included with a remanufactured transmission?
  • What is the process of ordering and installing remanufactured transmissions?
Get Answers

Made in the American Heartland

Why choose ACE remanufactured transmissions?

The more money your business generates, the greater the financial impact you can have on your family and your employees. We are passionate about creating products and systems that help you increase sales volume, decrease costs, and build an extremely valuable business.

Daniel Gott speaks about wholesale buying from ACE Transmission Remanufacturing.
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Quality

We build transmissions to precise OEM specifications and have the testing to prove it. We employ talented transmission experts and equip them with the best parts available.

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Warranty

We stand behind our work with an amazing nationwide parts-and-labor warranty at no extra charge. It covers each remanufactured transmission for three years (unlimited miles).

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Speed

We specialize in delivering your units quickly. We proactively build most units before you even request them. So we can often ship your unit the same day you order it!

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Industry Expertise

We understand your business model, because we own and operate a very successful transmission repair shop in southern Missouri. We want to share 40+ years of real-world experience with you!

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Why ACE makes the best transmissions
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Wow your customers with an amazing nationwide parts-and-labor warranty – free with every unit

Since we remanufacture transmissions in our own factory, we’re confident each unit will stand the test of time. That’s why we include a fantastic warranty at no extra charge. You get to offer this great selling point to your customers and look like a hero!

  • Gain customer confidence
  • Close more sales, faster
  • Protect your profits
  • Get nationwide coverage
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Learn how to run a better auto repair shop

We founded our own transmission repair shop in 1981. We’ve survived and thrived through good times and bad for over 40 years. Now, we want to share decades of real-world experience with you!

Core Return Procedures

By Sarina Summers on June 12, 2025 To help streamline our processes and reduce confusion, we have updated our procedures forhandling core pickups on individual core returns, effective immediately. This is not effective onbulk core returns, those procedures still remain the same. Core pickups will now only be scheduled on…

Read our shop owner’s blog
Marvin Gott smiling in his transmission shop in Springfield MO.
Founder Marvin Gott

About ACE Transmission: Living the American Dream

ACE Transmission grew from a tiny, one-man shack to become the undisputed #1 transmission repair and remanufacturing company in Southwest Missouri. Now we provide reman units to shops like yours across the USA.

Read about our unique history
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Frequently Asked Questions

A remanufactured transmission (often called a “reman”) is completely disassembled, cleaned, and rebuilt with all worn or damaged components replaced. At ACE, every unit is dyno tested, fitted with re-machined parts, and backed by a nationwide warranty. Unlike used or lightly rebuilt units, our remanufactured transmissions are built to OE standards—or better.

If you’re an installer, you know the pain of comebacks and failed parts. ACE’s transmission remanufacturing process includes common failure-point fixes, upgraded components, and thorough validation testing. That means fewer headaches for your shop, less time spent on rework, and more satisfied customers.

Yes—every ACE transmission arrives as a complete transmission assembly. That includes the torque converter, updated valve body, and critical electronics (when applicable), so your install is as close to plug-and-play as possible. No guesswork. No scavenging for parts. 

Plus, every unit is shipped with enough fluid to complete the install, so you don’t have to worry about sourcing your own or matching specs. When applicable, we also include any necessary vehicle-specific updates or upgrades—saving you time and keeping comebacks off your schedule.

Our standard warranty covers 3 years, unlimited mileage—including parts, labor, shipping, and Mobil 1 fluid. It’s transferable and backed by a no-hassle claims process with fast turnaround.

Yes—but here’s the part your shop will appreciate: we don’t charge the core deposit up front. Instead, it’s simply billed to your account and only becomes due if the core isn’t returned within 120 days. That means no out-of-pocket core cost at the time of purchase, giving your shop more flexibility with cash flow. As long as the original transmission (core) is returned in acceptable condition within the return window, there’s no charge—just a smooth transaction from start to finish.

We only carry automatic transmissions. ACE specializes in remanufactured automatic transmissions that are fully assembled, dyno-tested, and ready for install. If you’re looking for a replacement for a manual transmission, we recommend sourcing from a supplier that focuses on manual builds.