# BD Diesel 04-06 Chevy Silverado / GMC Sierra 6.6L 4WD Roadmaster Transmission & Converter Package

The BD RoadMaster Allison transmission is built for reliability and peace of mind. Designed for stock or mildly modified Duramax GM Trucks, the RoadMaster increases durability with a modified valve body. These modifications increase the torque capacity of the clutch packs, including doubling the capacity of the failure-prone C2 clutch! The transmission also receives a BD Diesel Deep aluminum pan, for an additional 3.5 quarts of fluid, helping to keep transmission temperatures cool while towing. Every RoadMaster Allison transmission package includes a billet ProForce torque converter and is dyno tested before shipping.

-   Increased clutch torque holding capacity (double capacity for C2 and C4 clutches), for less slip while towing
-   Increased Clutch Torque Holding Capacity \[Double Capacity For C2 And C4 Clutches\] For Less Slip While Towing
-   Deep aluminum pan for additional 3.5 quarts of fluid capacity to help keep temperatures lower
-   Billet ProForce torque converter for reliable converter clutch apply
-   Stock clutch counts in transmission

This Part Fits:

Year

Make

Model

Submodel

2004-2005

Chevrolet

Silverado 2500 HD

Base

2004-2006

Chevrolet

Silverado 2500 HD

LS

2004-2006

Chevrolet

Silverado 2500 HD

LT

2004-2006

Chevrolet

Silverado 2500 HD

WT

2004-2005

Chevrolet

Silverado 3500

Base

2004-2006

Chevrolet

Silverado 3500

LS

2004-2006

Chevrolet

Silverado 3500

LT

2004,2006

Chevrolet

Silverado 3500

WT

2004-2005

GMC

Sierra 2500 HD

Base

2006

GMC

Sierra 2500 HD

SL

2004-2006

GMC

Sierra 2500 HD

SLE

2004-2006

GMC

Sierra 2500 HD

SLT

2004-2006

GMC

Sierra 2500 HD

WT

2004-2005

GMC

Sierra 3500

Base

2006

GMC

Sierra 3500

SL

2004-2006

GMC

Sierra 3500

SLE

2004-2006

GMC

Sierra 3500

SLT

2004-2006

GMC

Sierra 3500

WT

## Details

- **Price:** 9214.52 CAD
- **Vendor:** BD Diesel
- **Type:** Transmissions

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 9214.52 CAD | In stock |

## Images

- Photo - Primary
- Photo - out of package
- Photo - out of package
- Photo - out of package
- Photo - out of package
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/bd-diesel-04-06-chevy-silverado-gmc-sierra-6-6l-4wd-roadmaster-transmission-converter-package)
> Updated: 2026-06-26