Take your early Duramax drivetrain to the next level with the BD Diesel 1064704SS TowMaster Allison 1000 Transmission & Converter Package. Purpose-built for towing and daily duty, this upgraded 5-speed transmission is paired with a matched performance torque converter and engineered with high-capacity clutch packs, revised oil circuits, and a heavy-duty pan for superior durability and heat management. If your LB7 is due for a replacement or you're planning for longevity, this is your go-to transmission upgrade.

💰 $2,100 Refundable Core Deposit Required
⏱️ Estimated Install Time: 9 Hours

✅ Key Features

TowMaster Transmission Highlights:

• BD Aluminum Deep Sump HD Pan (adds 3.5 quarts for better cooling)

• High-energy frictions and revised oil circuits

• Upgraded converter lock-up valve boosts lock-up pressure

• A & B trim valves deliver full clutch pressure

• Dyno-tested for verified performance

• Enhanced clutch capacity:

  • C1: 8 clutches (+14%)

  • C2: 7 clutches (+17%)

  • C3: 7 clutches (+75%)

  • C4: 7 clutches (+17%)

  • C5: 7 clutches (+17%)

BD Torque Converter Highlights:

• Enhanced stall for street/towing response

• Torque-multiplying cast aluminum stators

• Furnace-brazed fins for durability and fluid coupling

• Lower rpm launch than stock for improved drivability

• Triple lock-up clutch material for greater strength

• Stamp-forged steel cover resists warping under heat

🧰 Note: Converter and transmission are dyno-tested as a matched set.

🚙 Vehicle Compatibility

• 2001–2004 Chevrolet Silverado 2500HD/3500 6.6L LB7 Duramax (4WD)

• 2001–2004 GMC Sierra 2500HD/3500 6.6L LB7 Duramax (4WD)

⚙️ Fits vehicles equipped with the Allison 1000 5-speed automatic transmission.

📦 What’s Included

• BD TowMaster Allison 1000 Transmission (fully assembled)

• BD Triple-Torque Performance Converter

• BD Heavy-Duty Deep Sump Transmission Pan

• Dyno-tested matched transmission and converter

• Internal upgraded clutch packs, frictions, and trim valves

🛠️ Why Choose BD Diesel?

BD Diesel’s transmission and torque converter packages are engineered for heavy-duty use with precision-calibrated pressure systems, increased clutch capacity, and dyno-verified durability. Designed to outperform OEM units, BD products deliver the torque-holding power diesel owners demand—without compromising drivability or reliability.