SKU: 35091047914

ATS TCM Upgrade, A40 / A50 to T87A, 2011-2014 GM 6.6L Duramax

Sale price$1327.50 Regular price$1475.00
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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20

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Description

ATS TCM Upgrade, A40 / A50 to T87A, 2011-2014 GM 6.6L Duramax**ATS TCM Upgrade for GM 6. 6L Duramax (2011 Early 2015)** The Allison 6 speed automatic transmission used in GM 6. 6L Duramax trucks from 2011 to early 2015 is susceptible to failure due to the A40 and A50 TCM. These TCM modules contain delicate thin wires that can short out over time. In 2022, Allison discontinued support for the A50 and A40 TCM, leaving over 10,000 Duramax owners without reliable transmission control. To address this issue, ATS

**ATS TCM Upgrade for GM 6.6L Duramax (2011-Early 2015)**

 

The Allison 6-speed automatic transmission used in GM 6.6L Duramax trucks from 2011 to early 2015 is susceptible to failure due to the A40 and A50 TCM. These TCM modules contain delicate thin wires that can short out over time.

 

In 2022, Allison discontinued support for the A50 and A40 TCM, leaving over 10,000 Duramax owners without reliable transmission control. To address this issue, ATS developed a solution utilizing our Translator technology from the ATS Allison Conversion. This technology enables these trucks to operate with enhanced shifting and power control.

 

The A50 and A40 TCM have been used in all GM Duramax/Allison Diesel Trucks manufactured between 2006 and 2017. ATS is pleased to introduce the new GM Allison T87A upgraded TCM module. This upgraded module includes our Translator module, which incorporates our Co-Pilot transmission functions.

 

**Key Features:**

 

* Compatible with both stock and modified trucks.

* Increases line pressure and controls transmission performance.

* Direct replacement, requiring no permanent modifications. OEM-quality harness and module included.

* Equivalent to the TCM 24256861, 25978353, and 15117030 part numbers found in AC Delco.

* Features a faster processor compared to the A50, resulting in improved shift quality, faster shifting, and enhanced drivability.

 

**Included Components:**

 

* New unlocked T87a TCM with a custom ATS calibration optimized for Allison transmission performance.

* New Translator module with enhanced Co-Pilot transmission pressure control.

* Mounting bracket

* Wiring harness

 

Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 35091047914

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Dennis Stahl
Houston, US
★★★★★ 3
Good - but not really wide
Size: 2.5 Wide Big Kid, Color: Black/White
I purchased these for my son (6 Years old). He has quite a wide foot, so we purchased these because they said they were wide. They were not. Overall the style is nice, but in the end we had to return them and we wound up with some Sketchers wide sneakers that truly were wide.
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Reviewed in the United States on October 24, 2025
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Addison Brice DeSalvo
Carnegie, US
★★★★★ 5
Love them!
Size: 4 Wide Big Kid, Color: Black/White
Great quality, fit as expected, comfortable, and a great value for the money! I wear a size 4 widechildren’s shoe, which makes it very hard to find footwear that fits. And these fit just right!
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Reviewed in the United States on September 13, 2025
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Rebecca
Fort Morgan, US
★★★★★ 5
Good buy
Size: 7 Big Kid, Color: Black/White
Good quality, fit as expected
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Reviewed in the United States on September 21, 2025
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SmartFamilyShopper
West Palm Beach, US
★★★★★ 5
Looks great and are comfortable
Size: 6 Big Kid, Color: Black/White
Great shoes with a durable design. Upper mesh upper is breathable, they are stylish and very comfortable. My son loves it and it has become his favorite since the day he started wearing it.
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Reviewed in the United States on May 7, 2025
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Ian
Fort Morgan, US
★★★★★ 5
Light, comfy, and a brand you can trust with your feet
Size: 3.5 Big Kid, Color: Black/White
My son tears through shoes and somehow they're perpetually untied, no matter what we do. These are great as they don't need to be tied but look laced up, are very light and cushiony, and just look great so they go with everything. Saucony is also a great trusted brand that I've run a few marathons in myself, so I figured, let's try a pair and see how long they last. It's only been a few days but I'm getting good reviews from my son and they're his new go to pair.
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Reviewed in the United States on March 14, 2025

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