Product Description
The ATS 601-940-4368 TCM Upgrade is the ultimate solution for resolving failure-prone factory transmission control modules in your 2011-2014 GM 6.6L Duramax. Designed to replace the weak A40 and A50 TCM systems, this upgrade converts your truck to the modern and far more reliable T87A transmission control module used in newer Duramax platforms.
The factory A40 and A50 TCMs are widely known for internal wire failures that lead to communication loss, erratic shifting, and complete transmission shutdown. With OEM support discontinued, ATS engineered a permanent solution using advanced Translator® technology and Co-Pilot functionality to restore and enhance transmission performance.
This complete plug-and-play kit includes a brand-new unlocked T87A TCM with pre-installed ATS calibration, delivering faster processing speeds, improved shift timing, increased line pressure, and superior drivability.
FAQ
Q: Why do I need to upgrade my A40 or A50 TCM?
A: These factory modules commonly fail due to internal wiring issues and are no longer supported by Allison.
Q: What benefits does the T87A upgrade provide?
A: Faster processing, improved shift quality, better towing performance, and increased transmission durability.
Q: Is installation complicated?
A: No. This is a direct plug-and-play system with no permanent modifications required.
Q: Will this work on tuned or modified trucks?
A: Yes. The ATS system supports both stock and high-performance applications.
FITMENT
- 2011 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax (LML)
- 2012 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax (LML)
- 2013 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax (LML)
- 2014 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax (LML)
- 2011-2014 GMC Sierra 2500HD / 3500HD 6.6L Duramax (LML)
- 4WD Applications
Specifications for ATS 601-940-4368
| Specification | Details |
|---|---|
| Part Number | 601-940-4368 |
| Brand | ATS Diesel Performance |
| Product Type | Transmission Control Module Upgrade Kit |
| Upgrade Type | A40 / A50 to T87A Conversion |
| Installation | Plug-and-Play |
| Included Components | T87A TCM, Translator Module, Co-Pilot System, Wiring Harness, Mounting Bracket |
| UPC | Not Available |
| GTIN | Not Available |
| Shipping | Calculated at Checkout |
| Prop 65 Warning | ⚠️ This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm. Visit www.P65Warnings.ca.gov |
