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Budget ATS TCM Upgrade, A40 to T87, 4WD, 2009-2010 GM 6.6L Duramax ATS Diesel Performance
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Budget ATS TCM Upgrade, A40 to T87, 4WD, 2009-2010 GM 6.6L Duramax ATS Diesel Performance

Original price was: $2,950.00.Current price is: $1,180.00.

For orders under $49.00, a shipping fee of $10.99 applies.
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SKU: SK0723137-US20251229-085220 Category: Tag:
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The A50 TCM that is used to control the Allison 6-speed automatic transmission is the weak link of the Allison transmission. This is due to delicate thin wires inside the TCM that contact one another overtime and short-out the entire module. In 2022, Allison sent out a letter (SIL 15-1K2K-22) announcing the discontinuation of support for the A50. This effectively left over 10,000 Duramax owners out of their trucks. Some of the warning signs of a failing TCM are messages including Service Brake System, Stab

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