Collection: 2001-2004 6.6L LB7 Duramax Transmission
2001-2004 6.6L LB7 Duramax Transmission Parts
Improve the reliability and performance of your 2001-2004 6.6L LB7 Duramax with our high-performance transmission parts. Designed to handle increased horsepower and torque, these components provide the strength and durability needed for heavy-duty applications, whether you're towing, off-roading, or pushing your Duramax to its...
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ATS Allison LCT1000 Transmission Package 2WD 2001-2019 6.6L LB7 LLY LMM LML L5P Duramax
Regular price From $5,310.32 USDSale price From $5,310.32 USD Regular priceUnit price / per -
PPE 2001-2019 GM 6.6L Duramax w/ Allison 1000/2000/2400 Transmission Heavy-Duty Cast Aluminum Standard-Depth Transmission Pan
Regular price From $242.99 USDSale price From $242.99 USD Regular priceUnit price / per$269.99 USDSale -
PPE 2001-2019 GM 6.6L Duramax w/ Allison 1000/2000/2400 Transmission Heavy-Duty Cast Aluminum Deep Transmission Pan
Regular price From $332.99 USDSale price From $332.99 USD Regular priceUnit price / per$369.99 USDSale -
PPE Deep Trans Pan Filter - GM Allison
Regular price $16.19 USDSale price $16.19 USD Regular priceUnit price / per$17.99 USDSale -
ATS ALLISON DEEP TRANSMISSION PAN FITS 2001-2018 6.6L DURAMAX 301-900-4248
Regular price $372.75 USDSale price $372.75 USD Regular priceUnit price / per -
PPE 2003-2005 GM 6.6L Duramax w/ Allison Transmission Bar and Plate Transmission Cooler
Regular price $314.99 USDSale price $314.99 USD Regular priceUnit price / per$349.99 USDSale -
PPE 2001-2003 GM 6.6L Duramax w/ Allison Transmission Bar and Plate Transmission Cooler
Regular price $314.99 USDSale price $314.99 USD Regular priceUnit price / per$349.99 USDSale -
PPE 2001-2019 GM 6.6L Duramax Premium High-Efficiency Spin-On Transmission Fluid Filter
Regular price $17.99 USDSale price $17.99 USD Regular priceUnit price / per$19.99 USDSale -
Fleece Performance FPE-TL-LB7-LLY Allison Transmission Cooler Lines for 2001-2005 (LB7-LLY)
Regular price $269.00 USDSale price $269.00 USD Regular priceUnit price / per -
Fleece Performance FPE-ALILKR AlliLocker Torque Converter Lock-Up Controller
Regular price $179.00 USDSale price $179.00 USD Regular priceUnit price / per -
Fleece Performance FPE-TAPSHIFTER12 2001-2002 GM/Allison TapShifter
Regular price $349.99 USDSale price $349.99 USD Regular priceUnit price / per -
PPE 2001-2016 GM 6.6L Duramax Billet Input Shaft
Regular price $899.99 USDSale price $899.99 USD Regular priceUnit price / per$999.99 USDSale -
PPE Race Billet Stator Triple Clutch Torque Converter
Regular price From $1,619.99 USDSale price From $1,619.99 USD Regular priceUnit price / per$1,799.99 USDSale -
PPE 2001-2007 GM 6.6L Duramax w/ Allison Transmission Transfer Case Brace
Regular price $134.99 USDSale price $134.99 USD Regular priceUnit price / per$149.99 USDSale -
PPE 2001-2006 GM 6.6L Duramax Heavy-Duty Transfer Case Pump Housing Upgrade Kit (Pump Rub Kit)
Regular price $67.49 USDSale price $67.49 USD Regular priceUnit price / per$74.99 USDSale -
PPE 2001-2016 GM 6.6L Duramax Heavy-Duty Cast Aluminum PTO Side Plate Cover
Regular price From $71.99 USDSale price From $71.99 USD Regular priceUnit price / per$79.99 USDSale -
PPE 2003-2005 GM 6.6L Duramax Performance Transmission Cooler Purple Clips
Regular price $197.99 USDSale price $197.99 USD Regular priceUnit price / per$219.99 USDSale -
PPE 2001-2003 GM 6.6L Duramax Performance Transmission Cooler Orange Clips
Regular price $197.99 USDSale price $197.99 USD Regular priceUnit price / per$219.99 USDSale -
ATS Allison Performance Valve Body Fits 2001-2010 6.6L Duramax
Regular price $857.68 USDSale price $857.68 USD Regular priceUnit price / per -
ATS ALLISON BILLET INPUT SHAFT FITS 2001-2016 6.6L DURAMAX
Regular price $793.00 USDSale price $793.00 USD Regular priceUnit price / per -
ATS ALLISON BILLET INTERMEDIATE SHAFT FITS 2001-2010 6.6L DURAMAX 304-920-4248
Regular price $495.00 USDSale price $495.00 USD Regular priceUnit price / per -
ATS AUXILIARY TRANSMISSION COOLER KIT WITH 3/8 INCH LINES
Regular price $439.99 USDSale price $439.99 USD Regular priceUnit price / per -
Fleece Performance Fleece Performance Billet PTO Covers FPE-ALL-PTO-CVR
Regular price $104.99 USDSale price $104.99 USD Regular priceUnit price / per -
Fleece Performance 2 Setrab To -10AN Fittings Purchased W/Allison Transmission Cooler Lines FPE-TL-ST
Regular price $19.90 USDSale price $19.90 USD Regular priceUnit price / per -
Fleece Performance 2003-2005 GM/Allison TapShifter FPE-TAPSHIFTER35
Regular price $399.00 USDSale price $399.00 USD Regular priceUnit price / per -
Fleece Performance 5 Speed Allison Kodiak/TopKick TapShifter FPE-TAPSHIFTER-KDTK
Regular price $349.00 USDSale price $349.00 USD Regular priceUnit price / per -
ATS Allison LCT1000 Transmission Package 4WD 2001-2019 6.6L LB7 LLY LMM LML L5P Duramax
Regular price From $5,363.95 USDSale price From $5,363.95 USD Regular priceUnit price / per -
Fleece Performance NSBU Pigtail for 2001–2004 GM 2500/3500 Duramax with Allison Transmission
Regular price $79.99 USDSale price $79.99 USD Regular priceUnit price / per
2001-2004 6.6L LB7 Duramax Transmission Parts
Improve the reliability and performance of your 2001-2004 6.6L LB7 Duramax with our high-performance transmission parts. Designed to handle increased horsepower and torque, these components provide the strength and durability needed for heavy-duty applications, whether you're towing, off-roading, or pushing your Duramax to its limits. Upgrade your transmission with parts engineered to optimize shifting, reduce heat buildup, and extend the life of your drivetrain.
Premium Transmission Parts for 6.6L LB7 Duramax
Our transmission parts for the 2001-2004 6.6L LB7 Duramax include heavy-duty torque converters, billet transmission pans, transmission cooler kits, shift kits, and other performance-enhancing components. These parts are designed to handle high power levels, prevent overheating, and improve overall transmission reliability. Whether you’re upgrading for increased towing capacity or to enhance daily driving performance, our transmission upgrades are built to last.
Why Choose Our Transmission Parts?
Upgrading your 2001-2004 6.6L LB7 Duramax transmission ensures that your truck can handle demanding conditions with ease. With our premium transmission parts, you’ll experience smoother shifting, better heat dissipation, and improved reliability, even under high-stress driving conditions. Whether you’re towing, off-roading, or just looking for an overall improvement in performance, these components are designed to deliver superior results.
Key Features:
- Improved Shifting Performance: Shift kits and parts for smoother, more responsive shifts.
- Enhanced Durability: Built to withstand higher power and prevent overheating.
- Better Heat Management: Transmission cooler kits and billet pans to reduce the risk of overheating.

















