2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Torque Converters

The stock converter on your 2004.5-2005 GM 6.6L Duramax LBZ can withstand basic everyday applications; however, it can't handle the elevated levels of horsepower and torque that comes with your performance modifications. If you're throwing down huge amounts of power in your Duramax 6.6L, it's best to upgrade a premium torque converter we offer 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 reliability in every situation. Pair your torque converter upgrade with our full line-up of Transmission Upgrades!  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.