2001-2004 GM Duramax 6.6L LB7 Transmission & Transfer Case Upgrades

Once you've installed various performance modifications on your GM 6.6L Duramax LB7, chances are your transmission will have trouble compensating for the elevated levels of both horsepower and torque your Sierra/Silverado is throwing down. Here at Alligator Performance, our high-quality transmission upgrades and accessories will ensure your transmission stays in one place after adding on tons of power and performance. We offer transmission upgrades including transmission pans, torque converters, flex plates, modules, and even complete transmissions to give your 6.6L Duramax LB7 consistent performance you can count on! GM Duramax Fitments: 2001, 2002, 2003, 2004 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.