Remanufactured 6T45 Transmissions That Get It Done Right

The 6T45 transmission is a beefed-up sibling of the 6T40 — but it still sees its fair share of repeat failures. If you’re seeing wave plate damage, pressure control codes, or slipping under load, ACE has your fix.

Our remanufactured 6T45 units are upgraded, dyno-tested, and built to last. With real-world failure points already addressed, you get fewer comebacks and faster installs.

6T45 Transmission Failures We Fix

  • 3-5-R wave plate cracking or breakage
  • Torque converter clutch wear and TCC shudder
  • Solenoid codes (P0776, P0796, P0894)
  • Harsh shifts or delayed engagement
  • Internal bushing and valve body wear

We correct what causes the comebacks — not just what failed last time.

What to Expect from an ACE 6T45 Build

  • 🔧 Fully remanufactured using OE+ components
  • 🧪 Dyno-tested under load for pressure and shift quality
  • 🔁 Upgraded with hardened wave plates and revised valve bodies
  • 📦 Same-day shipping available on most units
  • 🛡️ 3-Year / Unlimited Mileage Warranty
  • 📂 Mobil 1 synthetic transmission fluid included

Vehicles Using the 6T45

The 6T45 appears in a range of GM mid-size crossovers and sedans:

  • Chevy Equinox / Malibu / Captiva Sport
  • Buick Regal / Verano / LaCrosse
  • GMC Terrain
  • Saturn Aura / Vue

Need to confirm compatibility or connector pinouts? Call our tech line.

Why Shops Stick with ACE 6T45 Remans

  • ✅ Fewer comebacks thanks to proven upgrades
  • ⏱️ Save labor hours vs. in-house rebuilds
  • 💬 Live tech support for install questions
  • 🔁 Transferable warranty for 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 support for your shop and 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 6T45 transmission issues?
Common complaints include harsh shifts, TCC slip, low or erratic line pressure, and internal damage from burnt clutches. Many failures trace back to known weaknesses in the valve body or torque converter.

Does ACE upgrade the 6T45 valve body during remanufacturing?
Yes. Our reman process includes updated valve body components, line pressure calibration, and flow improvements to reduce failure points over time.

Is the ACE 6T45 remanufactured transmission the same as using a rebuild kit?
No. A reman transmission is completely disassembled, cleaned, machined, and rebuilt with upgraded components. A rebuild kit only supplies parts — it doesn’t include the labor, testing, or warranty of a complete ACE unit.

What fluid is recommended for the 6T45 six-speed automatic transmission?
ACE units include Mobil 1 synthetic automatic transmission fluid, designed to meet or exceed GM OE specs for the 6T45.

Do your reman 6T45 transmissions come with a warranty?
Yes — all ACE 6T45 transmissions come with a 3-Year / Unlimited Mileage Warranty, which covers parts, labor, shipping, and fluid.

Get a Quote on a 6T45 Today

👉 Confirm the transmission model or RPO code you need
👉 Most orders ship same-day
👉 Our techs are here if you hit any snags

One call. One part. No guesswork. That’s the ACE way.