Remanufactured 6T40 Transmissions That Fix the Root Issues

The 6T40 shows up in your shop more than it should — especially in high-mileage Chevy Cruzes, Equinoxes, and Buick sedans. When it fails, you don’t want to waste time diagnosing another wave plate or TCC slip.

At ACE, we remanufacture 6T40s with the known problem areas already addressed. These units are built to OE+ specs, dyno-tested, and ready to install with zero guesswork.

6T40 Transmission Failures We Fix

  • 3-5-R wave plate failure (loss of reverse, slipping in 3rd and 5th)
  • Torque converter clutch issues and shudder
  • Solenoid performance codes (P0776, P0796)
  • Fluid contamination from worn bushings and debris
  • Valve body wear causing harsh or erratic shifting

Every ACE unit comes upgraded, calibrated, and ready to clear your bay.

What to Expect from an ACE 6T40 Build

  • 🔧 Fully remanufactured with all wear components replaced
  • 🧪 Dyno-tested for shift timing, line pressure, and lockup performance
  • 🔁 Upgraded with hardened wave plates and valve body updates
  • 📦 Same-day shipping on most builds
  • 🛡️ 3-year / unlimited mileage warranty
  • 📂 Mobil 1 synthetic fluid included

Vehicles Using the 6T40

You’ll find the 6T40 in many compact GM vehicles:

  • Chevy Cruze / Sonic / Equinox / Malibu
  • Buick Verano / Encore / Regal
  • GMC Terrain

Need help confirming fitment or electronic configuration? Our techs can help.

Why Your Shop Will Notice the Difference

  • ✅ Fewer comebacks — common failure points already corrected
  • ⏱️ Save hours over in-house diagnosis and rebuilds
  • 💬 Tech line support when questions come up
  • 🔁 Transferable warranty increases resale confidence

Warranty That Works — And a Core Return Policy That Makes Sense

  • ✔️ 3-Year / Unlimited Mileage Warranty
  • ✔️ Parts, labor, shipping, and Mobil 1 fluid included
  • ✔️ Nationwide warranty support for you and your customers

Core Return Policy — No Upfront Deposit, No Headaches

With ACE, our “Due On Receipt” customers don’t pay a core deposit upfront. We invoice it on paper, but it’s only due if the core isn’t returned within 120 days.

  • 🧾 No cash tied up at the time of order
  • 🔁 Full credit issued when the core is returned in rebuildable condition
  • ⏳ 120-day return window to give your shop flexibility

This helps you keep more cash on hand — and eliminates the usual hassle that comes with other reman suppliers.

Frequently Asked Questions (FAQ)

What are the most common 6T40 transmission problems?
Typical issues include wave plate failure, torque converter clutch shudder, pressure control solenoid faults, and contamination in the valve body. These failures are especially common in Chevy Cruze, Sonic, and Malibu applications.

How often should the 6T40 automatic transmission be serviced?
For best performance and longevity, the 6T40 six-speed automatic transmission should be serviced every 50,000–60,000 miles. This includes checking transmission fluid, inspecting line pressure, and scanning the control module for stored codes.

What fluid is recommended for the 6T40 transmission?
We include Mobil 1 synthetic automatic transmission fluid with every ACE reman. It meets or exceeds OE specs and is ideal for long-term protection.

Get a Quote on a 6T40 Today

👉 Talk with our team and confirm the build you need
👉 Most 6T40s ship same-day
👉 Your install just got a whole lot easier

This time, skip the patchwork. Replace it with an ACE unit that’s built to last.