ATS Diesel Stage 1 Transmission Package

2003–2004 Dodge Ram 2500 / Ram 3500 2WD 48RE Transmission

3099122272

Overview:

The ATS Diesel Stage 1 Transmission Package is a performance upgrade designed specifically for 2003 to 2004 Dodge Ram 2500 and Ram 3500 trucks equipped with the 48RE 2WD transmission. Engineered to enhance durability and reliability under demanding conditions, this package is ideal for diesel truck owners seeking improved transmission performance without extensive modifications. Whether you tow heavy loads or require a more responsive drivetrain, the Stage 1 package delivers a solid foundation for enhanced transmission longevity and smoother shifting.

Built by ATS Diesel, a trusted name in diesel performance parts, this transmission package addresses common weaknesses in the stock 48RE transmission, providing peace of mind for drivers who push their trucks hard on and off the road.

Key Features:

This Stage 1 Transmission Package incorporates several key upgrades to improve transmission strength and reliability:

• Heavy-duty internal components designed to withstand increased torque and load
• Upgraded clutches and bands for improved holding capacity and reduced slippage
• Precision-machined parts for enhanced fitment and smoother operation
• Reinforced valve body components to optimize hydraulic control and shift quality
• Durable seals and gaskets to prevent leaks and maintain system integrity
• Designed specifically for Dodge Ram 2500 and 3500 2WD models from 2003 to 2004
• Compatible with the 48RE transmission platform

Construction & Design:

The ATS Diesel Stage 1 Transmission Package is crafted using high-grade materials selected for their strength and wear resistance. Each component undergoes rigorous quality control to ensure precise tolerances and long-lasting performance. The design focuses on reinforcing the transmission’s most vulnerable areas, addressing common failure points encountered in heavy-duty applications. This results in a transmission package that not only improves durability but also maintains smooth and consistent shifting characteristics.

Installation & Fitment:

This package is a direct fit upgrade for 2003 and 2004 Dodge Ram 2500 and Ram 3500 trucks equipped with the 48RE 2WD transmission. Installation requires professional transmission disassembly and reassembly, making it suitable for experienced mechanics or performance shops. No major modifications to the vehicle’s drivetrain are necessary, ensuring a straightforward upgrade path that retains factory compatibility and drivability.

What's Included:

• Upgraded clutch packs and bands
• Reinforced valve body components
• Heavy-duty internal transmission parts
• Seals and gaskets for leak prevention
• Installation instructions and technical support documentation

Ideal For:

This transmission package is ideal for Dodge Ram 2500 and 3500 owners who demand enhanced transmission durability and performance from their 2003–2004 2WD trucks. It is especially suited for diesel enthusiasts who tow heavy trailers, haul large payloads, or operate their trucks in demanding conditions where the stock transmission may be prone to premature wear or failure. The Stage 1 package offers a reliable upgrade that extends transmission life and improves overall drivetrain confidence.

ATS Diesel Performance builds diesel upgrade solutions engineered for higher torque, towing confidence, and competition-level durability. Best known for performance-built transmissions, ATS also offers turbochargers, exhaust and fuel system components, and other supporting parts designed to handle heavy loads and elevated power on modern diesel trucks.