FORD 661047 Rear Drive Shaft Ring Gear 8.8IN 9744

( Manufacturer Part Number: 661047 ), ( Model: EXPEDITION ), ( Genuine Oem: Yes ), ( Seller Notes: 3.5l, At, 4wd, Swb ), ( Interchange Item Code: 431 ), ( Color: Black ), ( Year: 2020 ), ( Type: Drive Shaft ), ( Partout Id: A-131356748 )

Review FORD Rear Drive Shaft 8.8in Ring Gear fits EXPEDITION 4WD 2018–2021

The **Ford 661047 Rear Drive Shaft Assembly (8.8" Ring Gear, 4WD) for the 2018 2021 Expedition** is a precision-engineered, high-performance drivetrain component designed to deliver unmatched durability, efficiency, and off-road capability for Ford s iconic full-size SUV. This aftermarket upgrade replaces the stock rear axle assembly, featuring a **robust 8.8-inch ring gear** paired with a **spiral-bevel gearset** that enhances torque transfer while reducing wear and tear on the drivetrain. Built to meet or exceed OEM specifications, this drive shaft assembly incorporates **heat-treated steel components** and **precision-machined bearings**, ensuring long-lasting performance even under the most demanding conditions whether navigating rugged terrain, towing heavy loads, or hauling passengers over long distances. The **4WD-specific design** integrates seamlessly with the Expedition s advanced traction control and differential locking systems, providing superior ground clearance and improved articulation for off-road adventures. Whether upgrading for enhanced durability, better fuel efficiency, or increased towing capacity, this drive shaft assembly is engineered to elevate the Expedition s performance, offering a **direct replacement solution** that maintains compatibility with the vehicle s factory-installed components, including the **9744 differential housing**. Ideal for enthusiasts seeking a balance of strength and reliability, this aftermarket part is backed by rigorous testing to ensure it meets or surpasses the robustness of the original equipment, making it a trusted choice for those who demand nothing less than excellence from their Ford SUV.

### **Pros and Cons of buying a Ford 661047 Expedition (2018-2021) Rear Drive Shaft (8.8" Ring Gear, 4WD, Part #9744)**

1. **OEM Compatibility** This is a genuine Ford part, meaning it is designed to fit perfectly with your vehicle s drivetrain without modifications. It ensures proper alignment, balance, and performance, reducing the risk of premature wear or failure.

2. **Durability and Reliability** Ford s aftermarket and OEM parts are built to meet strict quality standards. The 8.8-inch ring gear is a robust component, and the 4WD-specific design ensures it handles the demands of all-wheel-drive systems effectively.

3. **Warranty Coverage** Purchasing from an authorized Ford dealer or a reputable supplier often includes a warranty, providing peace of mind against defects in materials or workmanship.

4. **Preventative Maintenance** Replacing a worn or damaged rear drive shaft is a proactive step to avoid more costly repairs down the line, such as axle failure, which can lead to a breakdown or even an accident.

5. **Improved Performance** A properly functioning rear drive shaft ensures smooth power delivery to the wheels, enhancing traction, handling, and overall driving experience, especially in 4WD conditions.

6. **Compatibility with Upgrades** If you plan to modify your Expedition (e.g., lift kits, off-road tires, or suspension upgrades), a new rear drive shaft ensures compatibility and prevents issues like binding or excessive stress on the drivetrain.

7. **Resale Value Protection** Maintaining your vehicle s drivetrain components in good condition helps preserve its resale value, as potential buyers will appreciate the absence of major wear-and-tear issues.

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1. **Cost** OEM parts like this one are typically more expensive than aftermarket alternatives. The price may range from $300 to $600 or more, depending on the supplier and any additional labor costs if installation is required.

2. **Installation Complexity** Replacing a rear drive shaft, especially in a 4WD vehicle, can be labor-intensive. It may require lifting the vehicle, removing the axle, and ensuring proper alignment. If you lack mechanical experience, professional installation will add to the cost.

3. **Potential for Counterfeit Parts** If purchasing from an unverified seller, there is a risk of receiving a knockoff or low-quality part that fails prematurely. Always buy from trusted sources like Ford dealers, authorized distributors, or reputable online retailers.

4. **Time-Consuming Process** The replacement process can take several hours, especially if done by a mechanic. This may require scheduling downtime for your vehicle, which could be inconvenient if you rely on it daily.

5. **Additional Wear Indicators** If the rear drive shaft is failing, other components (e.g., CV joints, bearings, or the differential) may also be worn. A thorough inspection may reveal further repairs are needed, increasing the total cost.

6. **Limited Lifespan in Harsh Conditions** While durable, drive shafts in extreme conditions (e.g., off-roading, towing heavy loads, or driving on rough terrain) may wear out faster than expected. Regular inspections are recommended in such cases.

7. **Potential for Misalignment** If not installed correctly, the drive shaft can become misaligned, leading to vibrations, uneven wear, or even damage to the transmission or differential. Precision installation is critical.

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The **Ford 661047 rear drive shaft (8.8" ring gear, 4WD, part #9744)** is a high-quality, OEM-replacement part that offers reliability, compatibility, and long-term performance for your 2018-2021 Expedition. Its benefits in terms of safety, drivetrain integrity, and resale value outweigh the drawbacks, particularly if you prioritize genuine parts and professional installation.

However, the **higher cost and complexity of installation** are significant considerations. If you re comfortable with mechanical work or have access to a trusted mechanic, the replacement is a worthwhile investment. For those on a tighter budget, an aftermarket part (from a reputable brand like **Mopar, ACDelco, or Dana**) could be a cost-effective alternative, though with slightly less warranty coverage.

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- **Buy from an authorized Ford dealer or a trusted online supplier** (e.g., RockAuto, PartsGeek, or local Ford service centers) to ensure authenticity and warranty.

- **Budget for installation costs** if DIY is not an option, factor in labor fees (typically $150 $300 depending on the shop).

- **Inspect other drivetrain components** (CV joints, axle seals, differential fluid) during or before replacement to avoid future issues.

- **Consider aftermarket options** only if you re confident in the brand s reputation (e.g., **Dana 44, Mopar, or ACDelco**) and are willing to accept a slightly shorter warranty period.

- **Prioritize replacement if symptoms like vibrations, clunks, or 4WD disengagement are present**, as ignoring these can lead to catastrophic failure.

**Final Verdict:** If your Expedition s rear drive shaft is failing or showing signs of wear, replacing it with the **Ford 661047 part** is a sound investment for long-term reliability. Just ensure you source it from a reliable seller and address any accompanying drivetrain concerns to maximize its lifespan.

Details:

All parts are covered by warranty. All Vehicles are brought in and drained of all fluids including gas, fuel, oil, coolant, brake fluids, power steering fluid, Freon more. Unless specified as Universal this is a direct fit Drive Shaft. The vehicles are then dismantled and parts removed.

4x2 122.5 WB 8.8 ring gear,4x4 gear. Most of which are stored inside our over 185,000 sq. Parts go back into cars rather than landfill. Original parts mean a perfect fit.

Every part is cleaned, tested and inspected by experts. This part fits vehicles made in the following years 2018 ,2019, 2020 ,2021.

part #: 661047 prices

• $50.00-$230.00

specifications universajoin:

• for models: 4wd, Expedition
• for makes: Ford
• for years: 2018-2021
• mpn: 661047
• model: Expedition
• genuine oem: Yes
• seller notes: 3.5l, At, 4wd, Swb
• interchange item code: 431
• color: Black
• year: 2020
• type: Drive Shaft
• partout id: A-131356748

shipping universajoin:

• cost: $0.00
• transit: 2-5 Days
• type: Fixed
• service: Standard
• class: Standard

offer universajoin:

• started: June 4, 2026
• options: Ship-to-home
• quantity: 1
• best offers: True
• availability: In Stock
• sold: 0

seller universajoin:

• rating: 99.9%
• city: Batavia, Ohio
• # reviews: 3794

general universajoin:

• condition: Used
• Transmission Drivetrain > Driveshafts Parts > Driveshafts

payments universajoin:

• other
• wallet: Google-pay
• credit card: Mastercard

returns universajoin:

• paid by: Buyer
• time: 30 Days
• policy: Returns Accepted

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