Jeep CJ7 Dana 44 Rear Axle For Sale: A Comprehensive Guide to Your Ultimate Off-Road Upgrade

Jeep CJ7 Dana 44 Rear Axle For Sale: A Comprehensive Guide to Your Ultimate Off-Road Upgrade jeeps.truckstrend.com

The Jeep CJ7, an icon of American off-roading, is renowned for its rugged simplicity and undeniable charm. While factory-equipped with capable components for its era, the relentless pursuit of more challenging trails and larger tires often pushes the limits of its original drivetrain. For many CJ7 enthusiasts, one of the most critical and impactful upgrades is the installation of a Dana 44 rear axle. If you’re searching for a "Jeep CJ7 Dana 44 Rear Axle For Sale," you’re not just looking for a part; you’re investing in enhanced durability, superior performance, and the peace of mind that comes with a genuinely robust driveline. This comprehensive guide will delve into everything you need to know about finding, evaluating, and ultimately acquiring the perfect Dana 44 rear axle for your beloved CJ7.

Understanding the Dana 44 Rear Axle in a CJ7

Jeep CJ7 Dana 44 Rear Axle For Sale: A Comprehensive Guide to Your Ultimate Off-Road Upgrade

At its core, a Dana 44 is a robust axle assembly manufactured by Spicer (now Dana Incorporated), known for its widespread use in light trucks and SUVs due to its excellent strength-to-weight ratio. Compared to the stock AMC 20 rear axle commonly found in many CJ7s, the Dana 44 offers a significant upgrade in terms of strength and reliability.

The Dana 44 features a larger ring and pinion gear set, typically around 8.5 inches in diameter, which provides a greater contact patch for the gear teeth, distributing stress more effectively. Its axle shafts are also generally thicker and often available in stronger alloy materials, reducing the likelihood of breakage, especially when running larger tires or tackling aggressive terrain. While a small percentage of CJ7s, particularly some Laredo and Renegade models, were optionally equipped with a factory Dana 44 rear axle, these are rare finds. For the vast majority of CJ7 owners, a Dana 44 is an aftermarket swap, transforming the vehicle’s off-road prowess. This upgrade addresses the inherent weaknesses of the AMC 20, which is notorious for its two-piece axle shafts and weaker housing design that can lead to bent flanges or broken shafts under stress.

Benefits of Upgrading to a Dana 44 in Your CJ7

The decision to swap a Dana 44 into your CJ7 isn’t just about replacing a worn part; it’s about unlocking a new level of performance and reliability. Here are the key benefits:

• Increased Strength and Durability: This is the primary reason for the upgrade. A Dana 44 can confidently handle larger tires (typically up to 35-37 inches, depending on other factors), more powerful engines, and the stresses of aggressive off-road driving, significantly reducing the risk of axle breakage on the trail.
• Superior Aftermarket Support: The Dana 44 is one of the most widely supported axles in the aftermarket. This means an almost endless supply of lockers (selectable, automatic, limited-slip), a vast array of gear ratios, stronger chromoly axle shafts, and heavy-duty differential covers are readily available from numerous manufacturers. This makes customization and repair far easier and more versatile.
• Enhanced Off-Road Capability: With a stronger axle, you can push your CJ7 harder and explore more challenging trails without constantly worrying about mechanical failure. This translates to more enjoyable and less stressful off-road adventures.



• Improved Resale Value: A CJ7 equipped with a properly installed and upgraded Dana 44 rear axle is significantly more appealing to potential buyers. It signals a well-maintained and thoughtfully upgraded vehicle, often commanding a higher price than a stock counterpart.
• Better Braking Options: Many Dana 44 axles, especially those sourced from later model Jeeps or Ford 8.8s (a common D44 alternative), come with disc brakes or are easily convertible to disc brakes, offering superior stopping power compared to the CJ7’s stock drum brakes.

Key Considerations When Buying a Used Dana 44 Rear Axle for Your CJ7

Finding the right Dana 44 for your CJ7 involves more than just locating one for sale. Several critical factors must be considered to ensure compatibility and avoid costly surprises:

• Axle Width (Wheel Mounting Surface – WMS): This is paramount. CJ7s typically used a "narrow track" (approx. 53.5 inches WMS) or "wide track" (approx. 56 inches WMS) width. Most aftermarket Dana 44 swaps use a wider axle for stability with larger tires. Common sources for Dana 44s that are good candidates include:
  • Jeep Grand Wagoneer/Cherokee (SJ): Often 58.5-60 inches WMS, a popular choice.
  • International Scout II: Approximately 58 inches WMS, another common donor.

  

  • Jeep JK Rubicon D44: While a strong axle, its width (65.5 inches) is often too wide for a traditional CJ7 look and requires significant fender/tire clearance modifications.
  • Custom/Aftermarket Dana 44 Housings: These can be ordered to specific CJ7 widths.
  • Always measure your desired width and compare it to the axle you’re considering.
• Gear Ratio: The differential’s gear ratio is crucial. If you’re only replacing the rear axle, its ratio must match your front axle’s ratio exactly (e.g., 3.73, 4.10, 4.56). Failure to match will lead to severe drivetrain binding and damage, especially in 4WD. If the axle you’re buying has a different ratio, factor in the cost of re-gearing both axles.
• Locker/Limited Slip: Some Dana 44s might come equipped with a limited-slip differential (LSD) or an aftermarket locker. This is a bonus but also influences the price. Confirm its type and condition.
• Axle Shafts: Inspect the axle shafts for straightness and any signs of damage. Confirm if they are original (typically 19 or 30 spline) or upgraded chromoly shafts. Flanged axle shafts are preferred over older tapered designs for strength and safety.
• Brakes: Determine if the axle has drum or disc brakes. If it has drums, consider the cost and effort of converting to disc brakes if that’s your goal. Inspect the condition of calipers, rotors/drums, and brake lines.
• Housing Condition: Thoroughly inspect the axle housing for rust, pitting, dents, or bends. A bent housing is a deal-breaker unless you plan on replacing the tubes entirely. Check the differential cover for leaks or signs of impact damage.
• Mounting Brackets: Dana 44s from different vehicles will have different spring perches, shock mounts, and control arm brackets. For a CJ7, you’ll likely need to cut off the existing brackets and weld on new CJ7-specific spring perches, shock mounts, and potentially a trac bar bracket if you’re running one. Factor in welding costs if you can’t do it yourself.

Where to Find a Dana 44 Rear Axle For Sale

The hunt for a Dana 44 can be an adventure in itself. Here are common avenues:

• Online Marketplaces: Websites like eBay, Craigslist, and Facebook Marketplace/Jeep groups are primary sources. Be specific in your search terms (e.g., "Jeep CJ Dana 44 rear axle," "Scout Dana 44," "Wagoneer Dana 44").
• Specialized Jeep Forums & Classifieds: Websites like Jeepforum.com, Pirate4x4.com, and local 4×4 club forums often have dedicated classified sections where enthusiasts sell parts.
• Off-Road Shops & Salvage Yards: Many dedicated 4×4 shops might have used axles on hand or can source one for you. Auto salvage yards are hit-or-miss but can occasionally yield a gem.
• Word-of-Mouth: Networking with local Jeep clubs and off-road communities can be highly effective. Someone might know a fellow Jeeper selling an axle or a complete parts vehicle.
• New Aftermarket Housings: If finding a suitable used axle proves too difficult or if you want a brand-new, purpose-built solution, companies like Currie Enterprises, Dynatrac, G2 Axle & Gear, and Spidertrax offer complete new Dana 44 housings (or similar strength axles like the Ford 9-inch) built to your exact specifications, though at a significantly higher cost.

The Buying Process: What to Ask and Inspect

Once you find a potential "Jeep CJ7 Dana 44 Rear Axle For Sale," it’s time for due diligence:

• Ask for Detailed Photos: Request clear, high-resolution pictures from all angles, including the differential cover, pinion flange, axle ends, and any existing brackets.
• Inquire About the Donor Vehicle: Knowing the year, make, and model of the vehicle the axle came from helps confirm its specifications (width, spline count, etc.).
• Ask About Mileage and History: While difficult to verify, inquire about how many miles were on the axle and if it was ever subjected to extreme abuse (e.g., competitive rock crawling).
• Confirm Gear Ratio and Internal Upgrades: Get explicit confirmation of the gear ratio. Ask if it has an open differential, limited-slip, or a locker. If so, which brand and model?
• Check for Leaks: Look for oil residue around the pinion seal, differential cover, and axle tube ends. Minor leaks might just need new seals, but significant leaks could indicate bearing issues.
• Inspect Housing Straightness: While hard to do without specialized tools, visually check for obvious bends or twists in the axle tubes. Look for signs of impact on the housing.
• Spin the Pinion Flange: If possible, spin the pinion flange by hand. Listen for grinding noises and feel for excessive play. A small amount of rotational play is normal, but excessive slop can indicate worn pinion bearings or gear setup issues.
• Inspect Axle Shafts: If possible, pull the axle shafts slightly to check for wear on the splines or bearing surfaces.
• Ideally, Inspect in Person: Nothing beats a physical inspection. Bring a tape measure, a flashlight, and a keen eye.

Installation and Post-Purchase Considerations

Acquiring the Dana 44 is just the first step. Installation requires planning and often professional help:

• Professional vs. DIY: Swapping an axle involves welding (for spring perches, shock mounts), brake line fabrication, driveshaft modification, and potentially gear setup. Unless you have advanced fabrication skills and the right tools, professional installation by an experienced off-road shop is highly recommended.
• New Components: Even a "good" used axle will likely benefit from new parts during installation. Plan for new wheel bearings, seals, brake components (pads, shoes, lines), U-bolts, and potentially a new differential cover.
• Gearing: As mentioned, ensure your front and rear axle gear ratios match perfectly. If they don’t, you’ll need to re-gear one or both axles. This is a precision job best left to experienced differential mechanics.
• Driveshaft: The length and U-joint size of your driveshaft may need to be modified or replaced to accommodate the new axle.
• Brake Lines: You’ll likely need new flexible brake lines and potentially adapters to connect to your CJ7’s existing brake system.
• Break-in Procedure: If you install new gears, follow the manufacturer’s break-in procedure precisely to ensure their longevity.

Practical Advice and Actionable Insights

• Set a Realistic Budget: Factor in not just the axle’s cost but also shipping, new parts (bearings, seals, brakes), potential re-gearing, and professional installation/fabrication.
• Be Patient: Finding the "perfect" Dana 44 at the right price can take time. Don’t rush into a purchase.
• Measure Twice, Buy Once: Double-check your desired axle width and compare it to any potential purchase.
• Don’t Be Afraid to Travel: The ideal axle might not be in your backyard. Be open to driving a few hours or arranging freight shipping for the right deal.
• Consider a Full Rebuild: If the budget allows, rebuilding the axle with new bearings, seals, and potentially new gears/locker before installation provides maximum peace of mind and longevity.

Jeep CJ7 Dana 44 Rear Axle Estimated Price Guide

Please note: These prices are highly variable based on condition, location, included components (gears, lockers), and the specific donor vehicle. This table provides a general range.

Axle Type/Source	Condition	Gear Ratio Included	Locker/LSD Included	Brakes Included	Estimated Price Range (USD)	Notes
Basic Used Dana 44	Good/Fair	Stock (e.g., 3.54, 3.73)	Open Diff	Drum	$500 – $900	Pulled from donor (Wagoneer, Scout). Will likely need new bearings, seals, spring perches. Good starting point.
Upgraded Used Dana 44	Very Good	Desirable (e.g., 4.10, 4.56)	Limited-Slip (LSD)	Drum/Disc	$900 – $1,500	May have lower miles, better condition, or a desirable factory LSD. Still expect to replace wear items.
Built Used Dana 44	Excellent	Desirable (e.g., 4.10, 4.56)	Aftermarket Locker	Disc	$1,500 – $2,500+	Often includes chromoly shafts, heavy-duty diff cover, and a professional re-gear/locker install. Comes with CJ-specific brackets welded on.
New Aftermarket Housing	Brand New	None	None	None	$1,500 – $3,000+ (Housing Only)	Housing only, no internals or shafts. Requires purchasing all components separately. Allows for custom width/mounts.
Complete New Dana 44	Brand New	Custom	Custom	Disc	$3,500 – $6,000+	Fully assembled, brand new axle with custom gears, locker, shafts, and desired width/mounts. Top-tier solution.

Note: Prices do not include shipping, installation, or additional parts needed for the swap (e.g., driveshaft modifications, brake lines, U-bolts).

Frequently Asked Questions (FAQ)

Q: Can I use a front Dana 44 axle as a rear axle for my CJ7?
A: No, you cannot. Front Dana 44 axles are designed for steering, have different casting designs, and are not built to handle the constant load and braking forces of a rear axle. They also have different differential housing offset and often a higher pinion angle.

Q: What’s the best donor vehicle for a Dana 44 rear axle for a CJ7?
A: Common and popular donors include Jeep Grand Wagoneer (SJ chassis) and International Scout II due to their relatively close widths and strength. Some Ford 8.8 axles (from Explorer/Mountaineer) are also popular swaps due to their strength and disc brakes, requiring similar bracket modifications.

Q: Do I need to re-gear my front axle if I buy a Dana 44 with different gears?
A: Absolutely. When running in 4WD, your front and rear axle gear ratios must be identical (e.g., both 4.10). If they are not, your drivetrain will bind, leading to severe damage to your transfer case, driveshafts, and axles.

Q: How much does it cost to rebuild a Dana 44?
A: The cost varies widely depending on what needs to be replaced. A basic rebuild with new bearings and seals might cost $200-$400 in parts, plus labor if done professionally. Adding new gears can add $300-$500 for the gear set alone, plus another $200-$400 for labor to set them up. A new locker can add $500-$1,200+.

Q: Is it worth upgrading to a Dana 44 if I only do light off-roading?
A: For light off-roading and smaller tires (under 33 inches), the stock AMC 20 might suffice, especially if it’s been upgraded with one-piece axle shafts. However, for serious off-roading, larger tires, or peace of mind, the Dana 44 is a significant and worthwhile investment that prevents potential headaches down the line.

Q: What’s the difference between flanged and tapered axle shafts?
A: Tapered axle shafts (found in older Dana 44s and AMC 20s) use a keyway and nut to hold the wheel hub onto a tapered shaft end. They are prone to bending, breaking, and the wheel coming off if the nut loosens. Flanged axle shafts are stronger, have a wider flange that bolts directly to the wheel hub, and are significantly safer and more durable. Always prefer a Dana 44 with flanged shafts.

Concluding Summary

The quest for a "Jeep CJ7 Dana 44 Rear Axle For Sale" is a journey toward transforming your classic off-roader into a more formidable and reliable machine. This upgrade is more than just a component swap; it’s an investment in your CJ7’s longevity and your confidence on the trail. By understanding the benefits, carefully considering the key factors like width and gearing, diligently inspecting potential purchases, and planning for the installation, you can successfully acquire and integrate this essential upgrade. A well-executed Dana 44 swap will not only enhance your CJ7’s legendary capability but also ensure that this iconic vehicle continues to conquer trails for generations to come.