BD DIESEL 1064774SS ROADMASTER TRANSMISSION AND CONVERTER PACKAGE ALLISON SILVERADO/SIERRA 2500HD/3500HD 6.6L DURAMAX 2004.5–2006 4WD

Product Description

The BD DIESEL 1064774SS Roadmaster Transmission and Converter Package is a complete heavy-duty upgrade for 2004.5–2006 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine, Allison automatic transmission, and 4WD. Engineered to handle increased torque, towing stress, and demanding workloads, this Roadmaster package delivers improved durability, firmer shifts, and long-term reliability.

BD Diesel 1064774SS Roadmaster transmission, Allison transmission upgrade, Duramax Allison transmission package, Silverado Sierra Allison transmission, heavy duty torque converter, towing transmission upgrade

This package includes a fully upgraded Allison transmission paired with a matched heavy-duty torque converter featuring improved friction material for better lock-up strength and reduced heat. Internal upgrades include new clutches and steels, revised valve body calibration for increased line pressure, and strengthened internal components designed to correct common Allison wear points. The result is a transmission built for confident towing, improved drivability, and extended service life.

Fitment

• 2004.5–2006 Chevrolet Silverado 2500HD / 3500HD
• 2004.5–2006 GMC Sierra 2500HD / 3500HD
• 6.6L Duramax Diesel Engine
• Allison automatic transmission
• 4WD models only

Key Features & Benefits

• Complete Roadmaster transmission and converter package
• Upgraded clutch packs and steels for increased torque capacity
• Revised valve body calibration for firmer, more positive shifts
• Heavy-duty torque converter with improved lock-up clutch material
• Designed for towing, hauling, and commercial use
• Improved durability over factory Allison transmission

Cross-Reference & Compatible BD Diesel Products (BD DIESEL ONLY)

• BD DIESEL 1064772SS ROADMASTER TRANSMISSION AND CONVERTER PACKAGE ALLISON 6.6L DURAMAX 2004.5–2006 2WD
• BD DIESEL 1064804SS ROADMASTER TRANSMISSION AND CONVERTER PACKAGE ALLISON 6.6L DURAMAX 2007–2010 4WD

Is this a complete transmission and converter package?

Yes. This package includes both the upgraded Roadmaster transmission and a matched heavy-duty torque converter.

Is this suitable for towing?

Yes. This Roadmaster package is designed to handle increased towing and hauling demands compared to the factory transmission.

Is a core charge required?

Yes. A refundable core charge applies to this transmission package.

Specifications for BD DIESEL PRODUCTS 1064774SS