The Jeep TJ Wrangler, a beloved off-road icon, often receives upgrades to enhance its already impressive capabilities. One of the most popular modifications is swapping the factory rear axle for a Dana 44. This upgrade significantly improves strength, durability, and overall off-road performance. This guide will delve into the reasons behind this popular upgrade, explore the benefits, and answer common questions about the Jeep TJ Dana 44 rear axle.
Why Upgrade to a Dana 44 Rear Axle?
The stock Jeep TJ rear axle, typically a Dana 35, is known for its relative weakness, particularly under heavy loads or aggressive off-road driving. The Dana 35's smaller ring gear and thinner axleshafts are prone to breakage, especially when subjected to high torque and stress. This can lead to costly repairs and downtime. The Dana 44, on the other hand, boasts a significantly stronger design with larger ring gears and thicker axleshafts, making it a much more robust and reliable option for serious off-roading. The increased strength allows for the use of larger tires and more aggressive driving techniques without the fear of axle failure.
What are the Benefits of a Dana 44 Rear Axle?
The advantages of upgrading to a Dana 44 rear axle are numerous:
- Increased Strength and Durability: This is the primary reason for the upgrade. The Dana 44 is considerably stronger than the Dana 35, capable of withstanding significantly more torque and stress.
- Larger Tire Capacity: The stronger Dana 44 can handle the increased load and stress associated with larger, heavier tires, allowing for better traction and ground clearance.
- Improved Reliability: The enhanced durability translates to fewer breakdowns and less maintenance, resulting in greater peace of mind on the trail.
- Higher Gear Ratio Options: Dana 44s often come with a wider range of gear ratio options, allowing for fine-tuning of gearing to optimize performance for specific terrains and tire sizes.
- Greater Availability of Aftermarket Parts: The popularity of the Dana 44 means a vast aftermarket support network exists, making it easier to find parts and upgrades.
What are the Different Types of Dana 44s Used in TJ Wranglers?
Several variations of the Dana 44 can be used in a TJ Wrangler, each with its own characteristics:
- High-Pinion Dana 44: Offers superior ground clearance due to the pinion gear's higher position.
- Low-Pinion Dana 44: More commonly found in factory applications, it offers a different, but potentially equally effective, approach to axle design.
- Ford 8.8: While not a Dana 44, it's sometimes considered an alternative offering similar strength at a potentially lower cost. However, it requires more modification for installation.
What is the Installation Process Like?
Installing a Dana 44 rear axle in a Jeep TJ is a significant undertaking requiring mechanical expertise. It's not a simple bolt-on upgrade and usually involves:
- Disassembling the existing rear axle.
- Installing the new Dana 44, including new brakes and potentially new control arms.
- Adjusting the brakes and drive shaft.
- Properly setting the pinion angle and wheel bearings.
This process is best left to experienced mechanics or skilled Jeep enthusiasts. Improper installation can lead to serious mechanical issues.
How Much Does a Dana 44 Rear Axle Cost?
The cost of a Dana 44 rear axle varies greatly depending on whether you buy a used or new axle, the specific type of Dana 44, and the required additional parts. Expect to invest a significant amount of money, including the cost of the axle itself, installation labor, and potentially any necessary additional parts.
Are there any potential downsides to installing a Dana 44?
While the benefits are substantial, there are a few considerations:
- Cost: The upfront cost of the axle, installation, and potentially necessary modifications can be significant.
- Complexity: Installation is complex and requires specialized knowledge and tools.
- Weight: The Dana 44 is heavier than the Dana 35, potentially impacting fuel economy and handling.
Conclusion
Upgrading your Jeep TJ with a Dana 44 rear axle is a substantial investment, but for serious off-roaders, it is often considered a worthwhile upgrade. The improved strength, durability, and reliability offer significant advantages, allowing for more aggressive driving and the use of larger tires. However, it's crucial to understand the cost, complexity, and potential downsides before undertaking this modification. Thorough research and professional installation are key to a successful upgrade.
