ATS Diesel Stage 5 Transmission Package

2003–2004 Dodge Ram 2500 / Ram 3500 4WD 48RE Transmission

3099542272

Overview:

The ATS Diesel Stage 5 Transmission Package is a comprehensive upgrade solution designed specifically for 2003 to 2004 Dodge Ram 2500 and Ram 3500 models equipped with the 48RE 4WD transmission. Engineered to handle increased power and torque demands, this package is ideal for diesel truck enthusiasts seeking enhanced durability and reliability under heavy-duty conditions.

Built to withstand the rigors of towing, hauling, and off-road use, the Stage 5 package offers significant improvements over stock transmission components. It is perfect for owners who want to maximize their truck’s performance while maintaining smooth shifting and long-term transmission health.

Key Features:

This Stage 5 Transmission Package incorporates advanced engineering and premium materials to deliver superior strength and performance. Key features include:

• Heavy-duty internal components designed to handle increased torque loads
• Upgraded clutch packs for improved holding capacity and reduced slippage
• Enhanced valve body for precise hydraulic control and shift quality
• Reinforced input and output shafts for greater durability
• High-quality seals and gaskets to prevent leaks and extend service life
• Optimized gear ratios tailored for diesel applications
• Complete rebuild kit included for a full transmission overhaul
• Tested and validated for 2003–2004 Dodge Ram 2500 and 3500 4WD models

Construction & Design:

The ATS Diesel Stage 5 package is meticulously engineered using premium-grade materials to ensure maximum strength and longevity. Components are precision-machined and heat-treated to withstand the high stresses encountered in diesel-powered trucks. The design focuses on reinforcing critical wear points within the 48RE transmission, delivering a robust solution that resists premature failure.

Each part is carefully selected and assembled to maintain factory-level fitment and function while providing enhanced performance capabilities. This attention to detail ensures reliable operation even under demanding driving conditions.

Installation & Fitment:

This transmission package is designed as a direct fit upgrade for 2003 and 2004 Dodge Ram 2500 and Ram 3500 trucks equipped with the 48RE 4WD transmission. Installation requires a professional transmission rebuild and should be performed by a qualified technician familiar with heavy-duty diesel transmissions.

No major modifications are necessary, but proper tools and expertise are essential to ensure correct assembly and optimal performance. Following ATS Diesel’s installation guidelines will help achieve the best results and long-term reliability.

What's Included:

• Complete set of upgraded clutch packs
• Reinforced input and output shafts
• Enhanced valve body assembly
• High-quality seals and gaskets
• All necessary hardware for rebuild
• Detailed installation instructions

Ideal For:

This Stage 5 Transmission Package is ideal for Dodge Ram 2500 and 3500 owners who demand more from their trucks. Whether you tow heavy trailers, haul large payloads, or require a transmission that can handle increased power from performance upgrades, this package provides the strength and reliability needed to keep your truck running smoothly under tough conditions.

It is especially suited for diesel enthusiasts looking to extend the life of their 48RE transmission while improving shift quality and overall drivetrain durability.

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.