2004.5-2005 Silverado & Sierra 2500 & 3500 Duramax LLY Torque Converters

Your Duramax LLY may be able to make some serious levels of horsepower and torque, but the factory torque converter on your truck likely has over 150k miles on it and isn't ready for the strain of aggressive tuning. Tier One's performance torque converters for 2004.5-2005 Silverado & Sierra 2500 & 3500 Duramax LLY trucks can hold all the power you need your Duramax truck to throw down. We carry Duramax LLY torque converters that range from budget-friendly stock replacements for getting your truck back on the road, all the way to billet torque converters with multi-disc designs that can hold enormous power without cracking, warping, or burning up. If your torque converter has already failed and sent debris through the rest of the system, a simple replacement might not be enough, and you may need to swap the whole unit with one of our 2004.5-2005 Duramax LLY Complete Transmissions. A torque converter working hard under a heavy load generates massive amounts of heat, so keep that heat from cooking your fluid and ruining your new converter with one of our 2004.5-2005 Duramax LLY Transmission Coolers. To get the most out of your new converter, your transmission needs to apply the correct fluid pressure, so ensure your lock-up is firm and reliable by upgrading to one of our 2004.5-2005 Duramax LLY Valve Bodies. While you have the transmission disconnected to install the converter, it's the perfect time to upgrade other maintenance items, so see what else you should swap in our 2004.5-2005 Duramax LLY Transmission Parts.