ATS TCM Upgrade A40 to T87 4WD 2009-2010 GM 6.6L Duramax

ATS Diesel Performance is a diesel performance manufacturer known for drivetrain and towing upgrades. The company designs parts that improve reliability, power delivery, and vehicle control. ATS products support daily driving, towing, and heavy-duty diesel trucks. ATS engineers transmission components, turbo systems, and exhaust brakes in-house. Their products help manage heat, increase strength, and handle higher torque loads. These upgrades improve drivability while protecting critical drivetrain parts. Diesel owners trust ATS for proven performance solutions. Whether towing heavy loads or upgrading for reliability, ATS delivers durable parts built for real-world use.