Revolution Gear & Axle DC-D44-JK Discovery Series 4340 Chromoly Front Axle Kit

Vehicle Fitment

• 2007-2018 Jeep Wrangler JK (all trims, 4WD) with factory Dana 44 front axle and 30-spline axle shafts - fitment beyond 2018 unconfirmed at time of listing.

Features

• 4340 chromoly front axle kit designed for strength and durability.
• Discovery Series configuration offers robust performance upgrade for off-road use.
• Includes two inner chromoly axle shafts and two stub outer chromoly shafts for full front axle replacement.
• Uses 1350-style universal joints for greater torque capacity compared to smaller U-joints.
• Designed for use with factory front axle lockers - compatibility is required.
• Snap-ring retainer kits and necessary hardware included for installation.
• Backed by a 10-year limited warranty covering manufacturing defects and axle breakage / bent splines (U-joints typically 1-year warranty).
• Made in the USA from premium materials and engineered for demanding off-road conditions.

Specifications

• Material: 4340 Chromoly steel construction.
• Spline count: 30-spline axle shafts (front) designed to match factory Dana 44 30-spline configuration.
• Joint style: 1350-series U-joints (larger size) for enhanced strength.
• Location: Front axle replacement kit for the front Dana 44 axle housing.
• Warranty: 10-year limited warranty on Discovery Series front axles.

Included Components

• 2x Inner 4340 chromoly axle shafts
• 2x Outer chromoly stub axle shafts
• 2x 1350-series U-joints (Dana Spicer style 5-7166X) or equivalent
• 8x Full-circle snap-rings for shaft retention
• Installation instructions and hardware kit

Product Description

The Revolution Gear & Axle DC-D44-JK kit is specifically engineered for the front Dana 44 axle found in the 2007-2018 Jeep Wrangler JK models. This 4340 chromoly upgrade kit replaces the factory shafts with heavy-duty chromoly components and 1350-series U-joints, making it ideal for serious off-road use, larger tires, and high-torque setups. By upgrading to stronger materials and components, you gain improved durability, resistance to twist or breakage, and better performance under stress.

Installation replaces the front axle shafts and stub outs, retaining your factory axle lockers and housing while boosting the strength of the drivetrain. The use of larger U-joints enhances the joint's ability to handle flex, angle changes, and drive line abuse. With a 10-year limited warranty backing the Discovery Series axles, you're investing in long-term reliability for your Jeep's front end.

Fitment covers 2007-2018 Jeep Wrangler JK models with front Dana 44 and 30-spline configuration; compatibility beyond 2018 is unconfirmed at the time of this listing. Before purchase, verify that your vehicle has the correct axle housing (Dana 44 front), factory locker (if required), and 30-spline configuration to ensure proper fitment. This kit is best for Jeep owners who demand rugged performance in off-road or high-stress environments.