Jeep Wrangler Rubicon Axle - Front Right Inner - Yukon Gear & Axle - Chromoly 4340 - `03-`06

Jeep Wrangler Rubicon Axle - Front Right Inner - Yukon Gear & Axle - Chromoly 4340 - '03-'06 is a direct replacement right-hand front inner axle for Dana 44-equipped Rubicon Wranglers (TJ). Built from 4340 chrome-moly steel, this axle is designed for heavy-duty use with larger tires and increased power.

This Yukon 4340 chromoly inner axle measures 31.84" long and features 30 splines. Manufactured with cold roll formed splines and advanced induction coil heat treating, it delivers increased strength and fatigue resistance compared to typical OE shafts. Yukon rates these 4340 axles for up to 50% greater strength over stock components, making them a sensible choice for enthusiasts upgrading drivetrain durability without changing axle geometry.

Features

• 4340 chrome-moly construction for higher tensile strength
• 31.84" length, 30 splines — right-hand front inner for Dana 44
• Cold roll formed splines and induction coil heat treating
• Direct fit for Rubicon TJ ('03–'06) Dana 44 applications
• Limited lifetime warranty covering manufacturing defects and axle breakage (non-transferable)

This axle is a practical upgrade for Jeep owners planning larger tires or higher horsepower who want a proven replacement shaft from Yukon Gear & Axle. It is sold as the front right inner (YA W39602) for Dana 44 Rubicon applications from 2003–2006. The warranty includes a "no questions asked" replacement on the first valid claim, with Yukon/Randy's Ring & Pinion making final warranty determinations.

If you have questions or want help confirming fitment, call us directly — 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations in Austin, Texas and the Los Angeles, California area where we offer installation and customization services. If you're considering purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.