Remanufactured 6L80 Transmissions

If you’ve been dealing with 6L80 failures, you already know the signs: torque converter shudder, harsh 2–3 shifts, or random no-drive scenarios. These aren’t isolated issues — they’re some of the most common failure patterns we see on this platform.

At ACE, we don’t just repair 6L80s — we remanufacture them with critical updates and real-world testing that helps your shop avoid comebacks and costly downtime. Our builds are engineered for Silverado fleets, Tahoe family rigs, and every GM customer who depends on consistent performance.

Common 6L80 Transmission Failures We Fix

  • Torque converter clutch breakdown and shudder
  • Harsh or delayed 2–3 shifts
  • Pump bushing failure causing pressure loss
  • Valve body wear leading to solenoid codes and erratic shifting
  • Overheating and fluid contamination under load

We replace root-cause components — not just the symptoms.

Built Beyond OE Specs

The 6L80 is a solid design, but it has a few repeat offenders that show up once mileage and heat cycles add up. Our process focuses on pressure stability, cooler flow, and clean converter lockup so the unit performs right after install — and stays that way.

What you can expect from an ACE 6L80:

  • Fully remanufactured from the case up (not “rebuilt on the fly”)
  • Dyno tested under load for consistent line pressure and shift quality
  • Critical updates applied during the build (wear items, valve body corrections, and known weak points addressed)
  • Ships ready for professional installation (your shop installs it — we stand behind it)

What’s Included With Every ACE 6L80

  • Fully remanufactured and dyno-tested transmission
  • Updated torque converter
  • New clutches, seals, bushings, and wear components (as required for a true reman build)
  • Mobil 1 synthetic transmission fluid
  • Parts, labor, shipping, and Mobil 1 fluid included.

Vehicles Commonly Using the 6L80

We supply reman 6L80s for many GM platforms, including:

  • Chevy Silverado 1500 / 2500
  • Chevy Tahoe / Suburban / Avalanche
  • GMC Sierra / Yukon / Denali
  • Cadillac Escalade
  • Chevy Camaro (select years)
  • Express / Savana Vans

Need to verify fitment or calibrations? Reach out and we’ll confirm specs with you.

Shipping That Keeps Your Bays Moving

Most units ship same-day when in stock.
That means less waiting, fewer scheduling headaches, and faster turnarounds for your customers.

Core Return Policy

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 upfront core deposit
  • 120 days to return the rebuildable core
  • Prepaid return labels included

Warranty Coverage

Every ACE remanufactured transmission is backed by a 3-year nationwide warranty, valid coast to coast across the United States.

Coverage is fully transferable and includes
parts, labor, shipping, and Mobil 1 fluid included.

Full warranty details available at Warranty

Installation Notes That Prevent Repeat Problems

A couple best practices that help these installs go smoothly:

  • Flush or replace cooler lines before install (especially after converter failure)
  • Verify cooler flow and address any overheating causes
  • Complete relearn/adaptive procedures as required for the vehicle

Let’s Get Your 6L80 Shipped Today

👉 Request a quote in under 60 seconds
👉 Confirm specs with our team
👉 Most units ship same-day