Eaton Rear Master Install Kit

2011–2018 Ram 1500 3.6L V6, 5.7L Hemi, 3.0L EcoDiesel

Part #: K-C9.25-11R

Overview

The Eaton Rear Master Install Kit is designed to simplify the process of upgrading or servicing the rear differential on select Ram 1500 models from 2011 to 2018. Whether you are installing a new Eaton differential or replacing your ring and pinion gears, this comprehensive kit provides all the essential components needed for a proper and reliable installation. Engineered for durability and precision, the kit ensures your differential operates smoothly and quietly, enhancing the overall performance and longevity of your drivetrain.

This kit is specifically tailored for Ram 1500 trucks equipped with the 3.6L V6, 5.7L Hemi V8, or 3.0L EcoDiesel engines paired with the 9.25-inch ZF rear axle. It is ideal for enthusiasts and professional mechanics looking for a complete, high-quality solution to differential upgrades or maintenance.

Key Features

The Eaton Rear Master Install Kit includes premium components engineered to meet or exceed OEM standards, ensuring a seamless fit and long-lasting performance. Key features include:

• Complete set of bearings and seals for the 9.25-inch ZF rear axle
• High-quality ring and pinion installation components
• Precision-machined parts for accurate gear alignment
• Durable materials designed to withstand heavy-duty use
• Components engineered to reduce noise and vibration
• All necessary hardware included for a full installation
• Compatible with 2011–2018 Ram 1500 models with 3.6L, 5.7L, and 3.0L engines

Construction & Design

The Eaton Rear Master Install Kit is built with premium-grade materials to ensure strength and reliability under demanding conditions. Bearings and seals are manufactured to tight tolerances, providing excellent durability and resistance to wear. The kit’s components are engineered to fit precisely within the 9.25-inch ZF axle housing, maintaining proper gear mesh and backlash for optimal drivetrain efficiency. Eaton’s commitment to quality ensures that each part contributes to a quiet, smooth-running differential that stands up to daily driving and off-road challenges alike.

Installation & Fitment

Installation of the Eaton Rear Master Install Kit is straightforward for experienced technicians and knowledgeable enthusiasts. The kit includes all necessary components to replace or upgrade the rear differential on Ram 1500 trucks equipped with the specified engines and axle. No major modifications are required, as the kit is designed to fit directly into the factory axle housing. Proper installation ensures correct gear alignment and preload, which are critical for reliable operation and extended component life.

What's Included

• Premium bearings for ring and pinion
• Seals for axle shafts and differential housing
• Installation hardware and shims
• Ring and pinion installation components
• Detailed instructions for proper assembly

Ideal For

This kit is ideal for Ram 1500 owners looking to upgrade their rear differential with Eaton components or replace worn ring and pinion gears. It suits daily drivers, off-road enthusiasts, and performance builders who demand reliable, quiet operation and long-lasting durability from their drivetrain. Professional mechanics will also appreciate the convenience of having all necessary parts in one kit, streamlining the installation process.

Eaton produces well-known performance drivetrain solutions—especially differentials and supporting install components—designed to help put power down more effectively. Eaton is also recognized for performance automotive supercharger technology (including TVS systems) used in various high-performance applications where consistent airflow and traction are critical.