Jeep CJ Dana 44 Rear Axle For Sale: The Ultimate Guide to an Essential Upgrade

Jeep CJ Dana 44 Rear Axle For Sale: The Ultimate Guide to an Essential Upgrade jeeps.truckstrend.com

For any serious Jeep CJ owner, the pursuit of enhanced off-road capability often leads to one critical component: the rear axle. Among the pantheon of durable differentials, the Dana 44 stands out as a legendary upgrade, a robust workhorse designed to handle the rigors of challenging trails, larger tires, and more aggressive driving. Finding a "Jeep CJ Dana 44 Rear Axle For Sale" isn’t just about buying a part; it’s about investing in the longevity, performance, and true potential of your classic CJ. This comprehensive guide will navigate you through everything you need to know about acquiring, inspecting, and understanding the value of this sought-after axle.

Understanding the Dana 44 Axle: Why It’s a Legend

Jeep CJ Dana 44 Rear Axle For Sale: The Ultimate Guide to an Essential Upgrade

The Dana 44 is an automotive axle manufactured by Dana Holding Corporation. Its reputation for strength and reliability precedes it, making it a perennial favorite for off-road enthusiasts. In the context of Jeep CJs (which often came with weaker Dana 30 or Dana 35 rear axles from the factory), upgrading to a Dana 44 is a significant leap forward in durability.

Key Features and Benefits:

• Robust Housing: The Dana 44 features a stronger, more rigid housing compared to its weaker counterparts, minimizing flex under load.
• Larger Ring and Pinion: With a larger ring gear diameter (typically 8.5 inches), the Dana 44 can handle significantly more torque, reducing the risk of gear failure, especially with larger tires and lower gearing.
• Stronger Axle Shafts: Generally, Dana 44 axles come with larger diameter axle shafts and more splines (30-spline is common for CJ Dana 44s, though 19-spline versions exist), providing increased resistance to twisting and breaking.
• Better Braking Options: Many CJ Dana 44s came with more robust drum brakes, and they are also excellent candidates for disc brake conversions, offering superior stopping power.
• Versatility for Upgrades: The Dana 44 platform is highly adaptable, allowing for easy installation of aftermarket lockers (ARB, Detroit, etc.), chromoly axle shafts, and heavy-duty differential covers.



• Increased Tire Capacity: For CJ owners looking to run 33-inch tires or larger, the Dana 44 becomes almost a necessity to prevent constant axle breakages on the trail.

In essence, the Dana 44 transforms a stock CJ’s drivetrain from adequate to exceptionally capable, preparing it for the demands of serious off-roading.

Identifying a Genuine CJ Dana 44 Rear Axle

While many vehicles used Dana 44 axles, not all are direct bolt-ins for a CJ. Knowing how to identify a true CJ Dana 44 (or one that can be easily adapted) is crucial.

Visual Cues and Key Characteristics:

• Differential Cover: The Dana 44 typically has a distinctive 10-bolt differential cover. Be careful, as some Dana 30 fronts also have 10 bolts, but the rear is always 10-bolt. The Dana 35 has a rounded, often egg-shaped cover with fewer bolts (usually 8).
• Casting Numbers: Look for "DANA 44" or "44" cast into the housing itself, usually on the long tube side or near the differential pumpkin.
• Axle Tube Diameter: Dana 44 axle tubes are generally thicker and larger in diameter than Dana 30/35 tubes.



• Spring Perches and Shock Mounts: A true CJ Dana 44 will have spring perches and shock mounts designed for the CJ’s leaf spring suspension and specific shock angles. While these can be cut off and re-welded, starting with the correct mounts saves significant fabrication.
• Width: CJ Dana 44s typically have a width (WMS – Wheel Mounting Surface) of around 50.5 to 51.5 inches. This is important for tire clearance and maintaining proper vehicle stance.
• Common CJ Models: Factory Dana 44 rear axles were more common in later model CJ-7s (especially Renegade and Laredo packages), CJ-8 Scramblers, and some older CJ-5s/CJ-6s. However, they were often optional, so not all CJs had them.

Distinguishing from Other Dana 44 Variants:
Be wary of Dana 44s from other Jeeps (YJ, TJ, XJ, ZJ) unless you’re prepared for significant fabrication. These axles will have different widths, spring perch configurations (coil springs vs. leaf springs), and potentially different bolt patterns. While a YJ Dana 44 is a common swap, it requires cutting and re-welding perches and shock mounts to fit a CJ.

The Hunt: Where to Find a Jeep CJ Dana 44 Rear Axle For Sale

Finding a suitable CJ Dana 44 rear axle requires patience and a multi-pronged approach.

1. Online Marketplaces:

   • eBay: Often has a wide selection, but shipping can be expensive. Be sure to check seller ratings and ask for detailed photos.
   • Craigslist: Excellent for local finds, saving on shipping. Use specific keywords like "Jeep CJ Dana 44 rear axle," "CJ7 Dana 44," or "Scrambler Dana 44."
   • Facebook Marketplace/Jeep Buy/Sell/Trade Groups: These groups are goldmines. Many enthusiasts prefer to sell directly to others in the community. Join CJ-specific groups.

2. Specialized Jeep Forums and Classifieds:

   • Websites like Pirate4x4, JeepForum, or CJ-specific forums often have dedicated classified sections where members sell parts. These communities are knowledgeable and can offer valuable advice.

3. Salvage Yards/Junkyards:

   • While increasingly rare, older junkyards might still have CJs. Call ahead and ask specifically for "Jeep CJ Dana 44 rear axles." Be prepared for a hands-on inspection.

4. Off-Road Shops and Parts Dealers:

   • Some shops specialize in used Jeep parts or perform axle swaps regularly and might have take-offs for sale. They might also sell rebuilt or new aftermarket Dana 44 options.

5. Swap Meets and Off-Road Events:

   • Major off-road events (like Easter Jeep Safari, Rubicon Trail events) and local swap meets are great places to find parts and network with sellers face-to-face.

6. Networking:

   • Talk to other Jeep owners, mechanics, and club members. Word-of-mouth can lead to hidden gems.

What to Look For When Buying: Inspection Checklist

A thorough inspection is paramount when purchasing a used Dana 44 axle. A seemingly good deal can quickly become expensive if it requires major repairs.

• Housing Integrity:

  • Bends: Lay a straight edge along the axle tubes. Any noticeable bend means the housing is compromised and likely junk.
  • Cracks: Inspect weld seams, spring perches, and around the differential pumpkin for any cracks, especially where tubes meet the center section.
  • Rust: Surface rust is common and manageable, but deep, pitting rust can compromise strength. Check for rust perforations, especially on the differential cover and brake components.

• Axle Shafts:

  • Straightness: While hard to check without specialized tools, look for obvious bends.
  • Splines: Inspect the splines on the ends of the shafts for twisting or excessive wear.
  • U-Joints (if applicable): Check for play or rust.

• Gears and Locker (if present):

  • Gear Ratio: Ask the seller for the gear ratio (e.g., 3.73, 4.10, 4.56). If unknown, you’ll need to verify it yourself by counting teeth or rotating the pinion and counting wheel turns. This is critical for matching your engine and tire size.
  • Backlash/Play: Rotate the pinion yoke by hand. A small amount of play is normal, but excessive clunking or looseness indicates worn gears or bearings.
  • Locker/Limited Slip: If it has one, inquire about its condition and operation.

• Bearings and Seals:

  • Leaks: Look for oil leaks around the pinion seal, axle tube seals, and differential cover gasket.
  • Wheel Bearings: Spin the axle shafts or hub. Listen for grinding noises or feel for rough spots, which indicate worn wheel bearings.

• Brakes:

  • Drums/Rotors: Check the condition of the braking surface.
  • Calipers/Wheel Cylinders: Look for leaks or seizing. Assume you’ll need to rebuild or replace these.
  • Backing Plates: Ensure they are not bent or severely rusted.

• Mounting Points:

  • Spring Perches: Confirm they are intact and positioned correctly for your CJ’s wheelbase.
  • Shock Mounts: Check for bends or damage.
  • Pinion Angle: While difficult to measure accurately on a loose axle, visually inspect for extreme deviations.

• Overall Completeness:

  • Does it come with brakes, drums/rotors, and axle shafts? Missing components add significantly to the overall cost.

Cost Considerations and Budgeting

The price of a used Jeep CJ Dana 44 rear axle can vary wildly, from a few hundred dollars for a bare housing to over a thousand for a complete, rebuilt unit with upgrades.

Factors Influencing Price:

• Condition: Excellent condition with no issues commands a higher price.
• Completeness: A "rolling" axle (with shafts, brakes, gears) will be more expensive than a bare housing.
• Gear Ratio: Desirable ratios (e.g., 4.10, 4.56 for larger tires) can increase value.
• Presence of Locker/Limited Slip: An installed locker or LSD significantly increases the price.
• Location: Shipping heavy axles can be very expensive, so local pickup often means a better deal.
• Market Demand: Prices fluctuate based on supply and demand.

Estimated Price Ranges (Highly Variable):

Item Description	Condition	Estimated Price Range (USD)	Key Features/Notes
Bare Dana 44 Housing (CJ)	Used, good, no bends/cracks	$200 – $400	No internals, shafts, or brakes. Requires full build.
Complete Dana 44 Axle (CJ)	Used, stock gears, open diff, drum brakes	$500 – $900	Includes axle shafts, differential (open), stock gears, drum brakes. May need rebuild.
Complete Dana 44 Axle (CJ) with Locker/LSD	Used, stock gears, aftermarket locker/LSD	$800 – $1,500	Includes axle shafts, locker/LSD, stock gears, drum brakes. Verify locker functionality.
Rebuilt/Refurbished Dana 44 Axle (CJ)	Professionally rebuilt, new bearings/seals	$1,200 – $2,500+	New bearings, seals, often new gears, sometimes disc brakes. Turn-key solution.
Dana 44 Axle (CJ) with Disc Brake Conversion	Used axle, upgraded with aftermarket disc kit	$1,000 – $1,800+	Superior braking. Ensure conversion kit is complete and properly installed.
Aftermarket Dana 44 Equivalent (New)	Brand new, heavy-duty, ready to install	$2,500 – $4,000+	Not a "used CJ Dana 44," but a new option for comparison. Often stronger.

Hidden Costs:
Always factor in shipping costs (which can be $200-$500+ for a cross-country freight shipment), new bearings, seals, brakes, gear oil, and potentially a gear set if the ratio isn’t what you need. If you’re not doing the work yourself, add labor costs for installation and setup.

Installation and Upgrade Tips

Once you’ve secured your Dana 44, the next step is installation.

• Preparation: Clean the axle thoroughly. If it’s not a rebuilt unit, consider replacing bearings and seals as a preventative measure. Inspect the gear set closely.
• Safety First: Use proper jack stands, wheel chocks, and personal protective equipment. An axle is heavy and can cause serious injury.
• Remove Old Axle: Disconnect brake lines, emergency brake cables, drive shaft, shock absorbers, U-bolts, and spring plates. Support the frame securely.
• Install New Axle: Carefully maneuver the Dana 44 into place. Attach spring plates, U-bolts, shocks, and drive shaft. Bleed the brakes.
• Pinion Angle: If you have a lifted CJ, you may need to adjust the pinion angle using shims between the leaf springs and spring perches to prevent driveline vibrations.
• Brake Upgrade: This is an ideal time to perform a disc brake conversion on the rear axle for significantly improved stopping power. Many kits are available.
• Fluid Fill: Fill the differential with the correct type and amount of gear oil (often 75W-90 or 80W-90, sometimes with friction modifier for limited slips).
• Break-In: If new gears were installed, follow the manufacturer’s break-in procedure (typically several short drives with cool-down periods) to properly seat the gears.

Potential Challenges and Solutions

• Finding a Straight Axle: Many used axles have been abused. Use the straight-edge test rigorously. If it’s bent, walk away.
• Dealing with Rust: Surface rust can be cleaned and painted. Deep rust requires more aggressive treatment and careful inspection for structural integrity.
• Identifying Correct Gear Ratio: If the seller doesn’t know, you’ll need to pop the cover and count teeth (ring gear teeth / pinion gear teeth) or use the rotation method (mark tire and pinion, rotate tire one full revolution, count pinion rotations).
• Shipping Large, Heavy Parts: Freight shipping is the most common method. Get multiple quotes. Consider picking up locally if feasible to save money and avoid potential shipping damage.
• Hidden Damage: Always inspect for signs of impact, twisted shafts, or excessive gear wear. If possible, get a mechanic’s opinion.

Frequently Asked Questions (FAQ)

Q1: Why should I upgrade to a Dana 44 rear axle for my CJ?
A1: The Dana 44 offers superior strength, durability, and better braking options compared to stock CJ Dana 30 or Dana 35 axles. It’s essential for running larger tires (33 inches and up), using lockers, and tackling more challenging off-road trails without fear of breaking components.

Q2: What CJ models commonly came with a Dana 44 rear axle from the factory?
A2: Factory Dana 44 rear axles were more common in later model CJ-7s (especially Renegade and Laredo packages) and CJ-8 Scramblers. Some very early CJ-5s/CJ-6s also had them. However, they were often an optional upgrade.

Q3: Can I put a YJ or TJ Dana 44 in my CJ?
A3: Yes, but it requires significant fabrication. YJ and TJ axles are wider and use coil spring mounts instead of leaf spring perches. You would need to cut off the old mounts and weld on new leaf spring perches and shock mounts in the correct CJ location and width. It’s often easier and more cost-effective to find a CJ-specific Dana 44 or a used Ford 8.8.

Q4: What gear ratio should I look for in a used Dana 44?
A4: The ideal gear ratio depends on your tire size and engine. Common desirable ratios for off-road use with larger tires include 3.73, 4.10, 4.56, or even lower. Match your rear axle ratio to your front axle ratio (if 4×4) or you will damage your drivetrain when engaged.

Q5: Is it worth rebuilding a used Dana 44, or should I buy a new aftermarket axle?
A5: It depends on your budget and mechanical skill. Rebuilding a used Dana 44 can be very cost-effective if the housing is solid. You can upgrade internals (shafts, locker, gears) as part of the rebuild. A new aftermarket axle is a bolt-in solution with new components and often higher strength, but comes at a significantly higher price.

Q6: How do I arrange shipping for a heavy axle?
A6: Freight shipping is typically required. You’ll need to get quotes from various freight companies. Ensure the seller can properly palletize and strap the axle for safe transport. Local pickup is almost always the cheapest and easiest option if feasible.

Conclusion

The quest for a "Jeep CJ Dana 44 Rear Axle For Sale" is a rite of passage for many CJ enthusiasts. This robust upgrade offers unparalleled durability, allowing your classic Jeep to tackle more aggressive terrain and accommodate the performance enhancements you desire. By understanding what to look for, where to find it, and how to properly inspect and install it, you can make an informed decision that will significantly enhance your CJ’s capabilities and ensure many more years of adventurous off-roading. Patience, thorough research, and a careful inspection are your best allies in securing this legendary piece of Jeep performance.