BD Diesel 1064704 TowMaster Allison 1000 Transmission 2001-2004 LB7 4WD

The BD Diesel TowMaster is a high-performance replacement transmission engineered specifically for 2001-2004 Chevrolet/GMC trucks with the LB7 Duramax engine and Allison 1000 transmission in 4WD configurations. When you increase engine power beyond stock levels, the factory transmission becomes the weak link in your drivetrain. The TowMaster addresses this with comprehensive upgrades designed for enhanced durability and performance under demanding towing and performance conditions.

Performance Enhancements:

• Significantly increased clutch pack counts across all clutch positions for improved holding power
• C1: 8 clutches (14% increase over stock)
• C2: 7 clutches (17% increase over stock)
• C3: 7 clutches (75% increase over stock)
• C4: 7 clutches (17% increase over stock)
• C5: 7 clutches (17% increase over stock)
• High-energy friction materials for superior heat resistance and longevity
• Revised internal oil circuits optimize fluid flow and pressure distribution
• Upgraded converter lock-up valve boosts lock-up pressures for more positive engagement
• Modified A and B trim valves deliver full line pressure directly to clutches

Included Components:

• BD Aluminum heavy-duty deep transmission pan (increases oil capacity by 3.5 quarts for improved cooling)
• Each transmission is individually dyno tested before shipment to ensure quality and performance

Important Installation Requirements:

• A BD torque converter must be installed at the time of transmission installation—use of third-party or OEM converters will void the warranty
• Estimated professional installation time: 9 hours

Warranty Coverage:

• Parts: 36 months or 150,000 miles
• Labor: 12 months or 24,000 miles
• Racing or competitive use is not covered under warranty

Emissions Compliance:

This transmission assembly does not require an Executive Order (EO) in California. As a replacement part by design, it is legal for sale and use in all 50 states.