2004.5-2005 GM Duramax 6.6L LLY Torque Converters

A fairly common issue that occurs on your 2004.5-2005 GM 6.6L Duramax LLY after adding various performance mods is the torque converter starts to fall short trying to catch up to the elevated levels of power your Sierra/Silverado is putting down. If you're gong to increase the power and performance of your GM 2500/3500, it's best to replace the factory converter with one of the premium aftermarket torque converters we offer here at Alligator Performance! These upgrades are capable of handling much higher levels of both horsepower and torque, giving your GM Truck consistent transmission performance and functionality in every situation. GM Duramax Fitments: 2004, 2005 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.