BD Diesel Transmission – Part # 1064704

The BD Diesel 1064704 Transmission is engineered to enhance the durability and performance of your heavy-duty drivetrain, specifically designed for 2001-2004 Chevy and GMC models with the LB7 4WD configuration. This transmission features a robust aluminum heavy-duty deep pan that increases oil capacity by 3.5 quarts, providing better heat dissipation and reducing case flex and internal oil leakage. The heat-dissipating fins on the pan help maintain optimal operating temperatures during severe towing or high-power applications, while the magnetic drain plug simplifies maintenance.

BD Diesel has incorporated revised oil circuits, extra clutch packs, and stronger internal components to handle up to 300% more power and torque than the stock transmission. The upgraded clutch count—C1 with 8 clutches, C2 with 7, C3 with 7, C4 with 7, and C5 with 7—significantly improves shift quality, durability, and torque capacity. The use of high-energy GPZ frictions and additional clutch frictions ensures smooth engagement and long-lasting performance under demanding conditions. The new convertor lock-up valve enhances lock-up pressures, optimizing fuel efficiency and power transfer.

This transmission is thoroughly tested on a dynamometer and includes advanced features such as revised oil circuits, enhanced regulator, pressure release spring, and modified power pistons for crisp, short shifts. The updated pressure release spring and regulator contribute to consistent line pressure, ensuring reliable clutch engagement. Every unit is assembled with precision and backed by a 36-month or 150,000-mile limited warranty, making it a reliable upgrade for fleet operators and heavy-duty enthusiasts. Proper installation and adherence to the recommended break-in procedures are essential for maximizing longevity and performance. This transmission is not warrantied for race or sled pull use, but it offers significant improvements in torque handling and drivetrain reliability for everyday heavy-duty applications.

Please note that using third-party or OEM converters may void the warranty. This product includes the BD aluminum deep transmission pan and PressureLoc for secure installation and optimal fluid management. Designed for direct fitment, this transmission enhances your vehicle’s capacity to handle increased power while providing long-term operational reliability.

Features:

• Handles up to 300% more power and torque than stock for heavy-duty applications

• Premium friction materials and extra clutch packs for smooth, reliable engagement

• Enhanced thermal capacity with heat-dissipating pan fins to reduce overheating and slippage

• Built for long-term drivetrain reliability with reinforced internals and increased clutch count

Fitment:
Chevrolet Silverado 2500 HD Base 2001 to 2004
Chevrolet Silverado 2500 HD LS 2001 to 2004
Chevrolet Silverado 2500 HD LT 2001 to 2004
Chevrolet Silverado 2500 HD WT 2004
Chevrolet Silverado 3500 Base 2001 to 2004
Chevrolet Silverado 3500 LS 2001 to 2004
Chevrolet Silverado 3500 LT 2001 to 2004
Chevrolet Silverado 3500 WT 2004
GMC Sierra 2500 HD Base 2004
GMC Sierra 2500 HD SLE 2004
GMC Sierra 2500 HD SLT 2004
GMC Sierra 2500 HD WT 2004
GMC Sierra 3500 Base 2004
GMC Sierra 3500 SLE 2004
GMC Sierra 3500 SLT 2004