Yukon Jeep JK Dana 44 Rear Chromoly Axle Shaft Kit - 30-Spline
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The Yukon Jeep JK Dana 44 4340 Chromoly Rear Axle Shaft Kit is a heavy-duty upgrade for 2007–2018 Jeep Wrangler JK Non-Rubicon models running the factory Dana 44 rear axle. Built from high-strength 4340 chromoly steel, this 30-spline axle shaft is designed to handle the additional torque and shock loads created by larger tires, locking differentials, and aggressive trail riding. Whether you're building a daily-driven Jeep, weekend trail rig, or dedicated rock crawler, upgrading the rear axle shafts is a practical way to add strength where the drivetrain takes a beating.
Yukon uses cold roll-formed splines and induction heat treatment to improve spline durability and fatigue resistance under load. This kit includes the 32" rear axle shaft along with the bearing, seal, ABS tone ring, retainer, and wheel studs needed for assembly. Designed for either the driver or passenger side of compatible JK Non-Rubicon Dana 44 rear axles, it retains the factory-style 5x5" wheel bolt pattern while providing a stronger shaft for demanding off-road use. The components ship unassembled and must be properly pressed and installed before the axle is ready for use.
Includes:
- (1) Yukon 4340 Chromoly Rear Axle Shaft - 30-Spline
- (1) Rear Axle Bearing
- (1) Rear Axle Seal
- (1) ABS Tone Ring
- (1) Axle Retainer
- Wheel Studs
Important: This kit includes components for one rear axle shaft, not both sides. Assembly is required before installation. The bearing, retainer, and ABS tone ring must be installed using the correct tools and procedures. Verify your axle configuration before ordering.
Specifications
| Manufacturer | Yukon Gear & Axle |
|---|---|
| Product Type | Chromoly Rear Axle Shaft Kit |
| Axle Platform | Jeep JK Dana 44 |
| Vehicle Platform | Jeep Wrangler JK Non-Rubicon |
| Model Years | 2007–2018 |
| Axle Shaft Material | 4340 Chromoly Steel |
| Axle Spline Count | 30-Spline |
| Axle Shaft Length | 32" |
| Axle Shaft Position | Rear / Left or Right |
| Wheel Bolt Pattern | 5x5" |
| Spline Manufacturing | Cold Roll-Formed |
| Heat Treatment | Induction Heat Treated |
| Axle Bearing | Included |
| Axle Seal | Included |
| ABS Tone Ring | Included |
| Axle Retainer | Included |
| Wheel Studs | Included |
| Assembly | Required Before Installation |
| Installation Type | Axle Shaft Replacement / Bearing & Retainer Assembly |
| Primary Application | Jeep JK Dana 44 Rear Axle Upgrades, Larger Tires & Off-Road Drivetrain Strength |
| Quantity | One Axle Shaft Kit / One Side |
Fitment
Designed for 2007–2018 Jeep Wrangler JK Non-Rubicon models equipped with the factory Dana 44 rear axle and 30-spline axle shafts. Fits either the left or right rear axle position on compatible applications.
| Make | Model | Year Range | Axle Application |
|---|---|---|---|
| Jeep | Wrangler JK Non-Rubicon | 2007–2018 | Dana 44 Rear / 30-Spline |
| Jeep | Wrangler Unlimited JK Non-Rubicon | 2007–2018 | Dana 44 Rear / 30-Spline |
Fitment Notes:
- Fits compatible Jeep Wrangler JK Non-Rubicon Dana 44 rear axle applications
- Designed for 30-spline differential configurations
- 32" overall axle shaft length
- Fits left or right rear axle positions
- Factory-style 5x5" wheel bolt pattern
- Includes bearing, seal, ABS tone ring, retainer, and wheel studs
- Components ship unassembled and require installation before use
- Not intended for factory Dana 30 front axle applications
- Verify compatibility before use with modified, aftermarket, or axle-swapped housings
Installation Note: The axle bearing, retainer, and ABS tone ring must be installed using appropriate pressing equipment and manufacturer procedures. Inspect the axle housing, bearing seat, seal surface, and differential splines before assembly.
FAQ
What is the advantage of a 4340 chromoly rear axle shaft?
4340 chromoly steel is a high-strength alloy commonly used in performance drivetrain components because of its toughness and fatigue resistance. Compared with many factory-style axle shafts, a properly manufactured 4340 shaft is better suited for the shock loads created by larger tires, locking differentials, and aggressive off-road driving.
Will this axle shaft fit my Jeep JK Non-Rubicon?
This kit is designed for compatible 2007–2018 Jeep Wrangler JK Non-Rubicon models equipped with a Dana 44 rear axle and 30-spline shafts. Verify your axle configuration before ordering, especially if your Jeep has been modified or fitted with an aftermarket axle.
Does this kit include both rear axle shafts?
No. This listing includes one 4340 chromoly rear axle shaft and the associated bearing, seal, ABS tone ring, retainer, and wheel studs for one side. Two kits are required to replace both rear axle shafts.
Will this axle shaft fit either side of the Jeep?
Yes. This 32" axle shaft is designed for either the driver-side or passenger-side rear axle position on compatible Jeep JK Non-Rubicon Dana 44 applications.
Does the axle shaft come fully assembled?
No. The axle shaft, bearing, seal, ABS tone ring, retainer, and wheel studs are supplied as components that require assembly before installation. Proper pressing equipment and installation procedures are necessary.
Can I use this axle shaft with an aftermarket locker?
Yes, provided the locker is designed for compatible 30-spline Jeep JK Dana 44 rear axle shafts. Verify the differential spline count and axle configuration before installation.
What is the benefit of cold roll-formed splines?
Cold roll-forming shapes the splines by displacing material rather than cutting it away. This process can improve fatigue resistance around the spline roots, where axle shafts experience high torsional loads during hard acceleration, rock crawling, and drivetrain shock.
Does this kit include the ABS tone ring?
Yes. The kit includes an ABS tone ring along with the axle bearing, seal, retainer, and wheel studs. The tone ring must be properly installed to maintain compatibility with the vehicle's wheel-speed sensing system.
What should I inspect when replacing a rear axle shaft?
Inspect the axle housing, bearing seat, seal surface, differential side gear splines, and related brake components. Confirm the axle bearing and retainer are properly installed and verify that the shaft rotates freely without abnormal movement before returning the vehicle to service.