Eaton Master Install Kit (REAR)

2007–2018 Jeep Wrangler JK 3.6L / 3.8L V6

Part #: K-D44-JK

Overview

The Eaton Master Install Kit (REAR) is a comprehensive solution designed to simplify the installation or upgrade of your Jeep Wrangler JK’s rear differential. Specifically engineered for 2007–2011 Jeep Wrangler 3.8L V6, 2012–2017 Jeep Wrangler 3.6L V6, and 2018 Jeep Wrangler JK 3.6L V6 models, this kit provides all the essential components needed to properly install an Eaton differential or replace your ring and pinion gears. By consolidating premium bearings, seals, and hardware into one convenient package, Eaton ensures a streamlined installation process that saves time and reduces the risk of missing critical parts.

Ideal for off-road enthusiasts and Jeep owners seeking enhanced drivetrain durability and reliability, this master install kit supports long-lasting, quiet operation under demanding conditions. Eaton’s reputation for quality and precision engineering means you can trust this kit to maintain optimal differential performance and extend the life of your vehicle’s rear axle assembly.

Key Features

This Eaton Master Install Kit is packed with features that guarantee a professional-grade installation and dependable performance:

• Complete set of premium bearings and races designed for rear differential applications
• High-quality seals to prevent leaks and contamination
• Precision-machined ring and pinion components compatibility
• Durable hardware including bolts and shims for accurate gear setup
• Engineered specifically for Jeep Wrangler JK models with 3.6L and 3.8L V6 engines
• Ensures quiet operation by minimizing gear noise and vibration
• Facilitates proper gear alignment and preload for extended component life
• Includes all necessary parts in one kit to eliminate multiple orders and delays

Construction & Design

The Eaton Master Install Kit is built with premium-grade materials to withstand the rigors of off-road driving and daily use. Bearings and races are manufactured to exacting tolerances, ensuring smooth rotation and minimal friction. Seals are crafted from durable elastomers that resist heat, oil, and debris intrusion, maintaining a tight barrier against contaminants. The hardware components are made from hardened steel to provide secure fastening and maintain gear alignment under heavy loads. Eaton’s engineering expertise guarantees that every part in the kit works harmoniously to deliver reliable differential performance and longevity.

Installation & Fitment

Designed for a direct fit on 2007–2011 Jeep Wrangler JK 3.8L V6, 2012–2017 Jeep Wrangler JK 3.6L V6, and 2018 Jeep Wrangler JK 3.6L V6 models, this master install kit simplifies the installation process by including all necessary components in one package. Whether you are upgrading to an Eaton differential or replacing your existing ring and pinion, the kit’s comprehensive parts list reduces the need for additional purchases and helps ensure a correct, professional installation. Installation requires standard differential service tools and mechanical knowledge, and following Eaton’s detailed instructions will help achieve optimal gear setup and performance.

What's Included

• Premium differential bearings and races
• High-quality oil seals
• Ring and pinion shims
• Mounting bolts and hardware
• Installation instructions

Ideal For

This Eaton Master Install Kit is perfect for Jeep Wrangler JK owners who are performing a rear differential upgrade or ring and pinion replacement. It is especially suited for off-road enthusiasts, daily drivers, and anyone looking to maintain or improve the reliability and quiet operation of their vehicle’s drivetrain. By providing all necessary components in one kit, it is an excellent choice for professional mechanics and DIY installers alike who demand quality and convenience.

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.