Transmission- Increase the durability of your drivetrain. BD Aluminum HD deep transmission pan, increases oil capacity by 3.5qt. High energy clutch material. Revised oil circuits. New convertor lock up valve to boost lock-up pressures. New A & B trim valves deliver full line pressure to the clutches. Increased clutch count. Clutch Count: C1 8 clutches (14% increase over stock), Clutch Count: C2 7 clutches (17% increase over stock), Clutch Count: C3 6 clutches (50% increase over stock), Clutch Count: C4 6 clutches (0% increase over stock), Clutch Count: C5 7 clutches (17% increase over stock). Each transmission is dyno tested. Torque Converter- Enhanced Stall- Street/Towing Applications, Torque multiplying cast aluminum stators. Lower rpm response than the stock converter. More efficient operation. Less heat and better fuel economy. Stamp-forged steel front cover. Furnace-brazed fins. Up to triple the amount of lock-up clutch material. Warranty- Parts 36 Month/150,000 Miles; Labor- 12 Month/24000 Miles.Installation InstructionsInstallation InstructionsThis Part Fits: Year Make Model Submodel 2004-2005 Chevrolet Silverado 2500 HD Base 2004-2005 Chevrolet Silverado 2500 HD LS 2004-2005 Chevrolet Silverado 2500 HD LT 2004-2005 Chevrolet Silverado 2500 HD WT 2004-2005 Chevrolet Silverado 3500 Base 2004-2005 Chevrolet Silverado 3500 LS 2004-2005 Chevrolet Silverado 3500 LT 2004 Chevrolet Silverado 3500 WT 2004-2005 GMC Sierra 2500 HD Base 2004-2005 GMC Sierra 2500 HD SLE 2004-2005 GMC Sierra 2500 HD SLT 2004-2005 GMC Sierra 2500 HD WT 2004-2005 GMC Sierra 3500 Base 2004-2005 GMC Sierra 3500 SLE 2004-2005 GMC Sierra 3500 SLT 2004-2005 GMC Sierra 3500 WT