FORD 370047A Federal Mogul Rear Inner Wheel Seal

( Manufacturer Part Number: 370047A ), ( Type: Automatic Transmission ), ( Items Included: Seal ), ( Types: F 250, F 350 ), ( Company: Federal Mogul ), ( Years: 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 ), ( Country Of Origin: United States )

Review FORD Federal Mogul Rear Inner Wheel Seal Lot fits F250 F350 1985–1999

The **Ford 370047A Rear Inner Wheel Seal** is a precision-engineered component designed exclusively for the **1985 through 1992 Ford F-Series Super Duty trucks**, including the **F-250 and F-350 models**, and is manufactured by **Federal Mogul**, a trusted name in automotive aftermarket and OEM sealing solutions. This high-performance seal is crafted to ensure a reliable, leak-free fit within the rear wheel hub assembly of these robust trucks, which were built to handle heavy-duty towing, hauling, and off-road demands. Constructed from durable, oil-resistant **nitrile rubber**, the seal features a **metal-reinforced lip design** that maintains optimal compression and sealing integrity even under extreme operating conditions, such as high-speed driving, aggressive towing, or prolonged exposure to fluctuating temperatures. Its **precision-molded shape** aligns perfectly with the **Ford 9-inch rear axle housing**, preventing dust, moisture, and contaminants from infiltrating the wheel bearing area, thereby extending the lifespan of the wheel bearings and reducing the risk of premature failure. The seal s **smooth, low-friction surface** minimizes wear on the axle shaft, contributing to smoother wheel operation and reduced noise, while its **robust construction** ensures resistance against deformation from radial loads, making it ideal for both on-road and off-road applications. Whether replacing a worn-out seal due to age, excessive wear, or damage from debris, this **direct-fit, high-quality Federal Mogul seal** provides the durability and performance required to keep your **F-250 or F-350** running smoothly for miles. Its compatibility with **1985 through 1992 model years** ensures a seamless installation, and its **OEM-level quality** guarantees that it meets or exceeds the standards of the original equipment, delivering peace of mind for truck owners who demand reliability in their heavy-duty vehicles.

### **Pros and Cons of Buying a Ford F-250/F-350 (1985 1992) with a Federal Mogul Rear Inner Wheel Seal (Part #370047A)**

#### **Pros of Purchasing This Part**

1. **Reliability and Durability** Federal Mogul is a well-known brand in the aftermarket, producing high-quality replacement parts that meet or exceed OEM standards. Their wheel seals are designed to resist wear, leaks, and contamination, which is critical for preventing wheel bearing failure and differential fluid loss.

2. **Compatibility with Older Ford Trucks** The **370047A** seal is specifically engineered for the **1985 1992 Ford F-250/F-350** with the **8.2L V8 (Eaton M10) or 7.5L/8.2L V8 (Eaton M10/M13)** rear axles. This ensures a proper fit, reducing the risk of installation errors that could lead to premature failure.

3. **Prevents Costly Wheel Bearing and Differential Damage** A failing rear inner wheel seal can allow grease to escape and contaminants (dirt, water, debris) to enter the wheel bearing and differential. Replacing it proactively prevents:

- **Wheel bearing failure** (which can lead to a seized wheel or dangerous driving conditions).

- **Differential fluid contamination**, reducing lubrication efficiency and accelerating internal wear.

- **Rust and corrosion** in the wheel hub and axle housing, which can weaken structural integrity over time.

- Removal of the wheel and brake components.

- Pressing out the old seal and installing the new one with a seal installer tool.

- Re-greasing the wheel bearing and torqueing the nut to specification.

Many mechanics and even experienced DIYers can complete this job in **1 2 hours** with basic tools.

5. **Cost-Effective Long-Term Solution** While the part itself is reasonably priced (typically **$20 $50** depending on source), replacing it early avoids far more expensive repairs such as:

- **New wheel bearings** ($100 $300 per side).

- **Differential rebuild or replacement** ($500 $1,500 ).

- **Axle housing replacement** (potentially $1,000 ).

A single seal replacement now can save **hundreds or thousands** in future damage.

- **Excessive noise** (grinding, whining, or humming from the wheel).

- **Vibration or pulling** due to a seized wheel bearing.

- **Loss of control** if the wheel bearing fails completely while driving.

Replacing the seal eliminates these risks.

7. **Warranty and Support** Federal Mogul offers **limited warranties** on their parts, and many reputable sellers (e.g., RockAuto, 1A Auto, local auto parts stores) provide return policies if the seal fails prematurely.

8. **Prevents Further Contamination** If the seal has already failed, grease and debris may have already entered the wheel bearing and differential. Replacing it early helps **slow further damage** and extends the life of these components.

---

#### **Cons of Purchasing This Part**

1. **Potential for Counterfeit or Low-Quality Seals** While Federal Mogul is a trusted brand, **counterfeit or knockoff seals** are sometimes sold online, especially on unregulated marketplaces. These may:

- Fail prematurely (within weeks or months).

- Not fit properly, leading to leaks or installation difficulties.

- Lack proper lubrication, causing excessive wear.

**Solution:** Purchase from **authorized dealers, RockAuto, or 1A Auto** to ensure authenticity.

- **Wheel bearing removal** (which can be tricky if the nut is seized).

- **Proper seal installation** (must be pressed in straight to avoid damage).

- **Grease application** (using the correct type and amount).

- **Torque specification** (over-tightening can damage the bearing).

**Solution:** If unsure, have a mechanic perform the job ( $100 $200 labor).

3. **Accessibility Challenges** On some **heavy-duty trucks**, especially those with **spider axles or custom setups**, accessing the rear wheel seal may be difficult due to:

- **Tight clearance** around the axle.

- **Heavy components** (e.g., lift kits, off-road suspensions).

**Solution:** May require **special tools** (e.g., angle seal installer) or **disassembling additional parts**.

- **Break down too quickly**, leading to seal failure.

- **Attract moisture**, causing rust in the wheel bearing.

**Solution:** Use **high-quality axle grease** (e.g., Mobil 1 Synthetic, Castrol LMX, or Ford Motorcraft AX-4) as specified in the service manual.

5. **Potential for Hidden Damage** If the seal has been leaking for a while, the **wheel bearing or differential may already be damaged**, requiring additional repairs beyond just the seal. Symptoms of existing damage include:

- **Excessive play** in the wheel.

- **Grinding noise** when turning or braking.

- **Differential fluid contamination** (dark, gritty, or watery).

**Solution:** Inspect the wheel bearing and differential during installation. If damaged, replace them as well.

6. **Time-Consuming for Busy Owners** If the truck is a **workhorse or daily driver**, taking it off the road for a seal replacement may not be ideal. However, this is a **proactive maintenance task** that should be scheduled during routine service.

- **New wheel bearing** (if worn).

- **Differential fluid change** (if contaminated).

- **Grease fittings or seals** (if damaged during removal).

**Solution:** Budget for **$50 $150 extra** if other components need replacement.

---

### **Conclusion**

Replacing the **Federal Mogul rear inner wheel seal (370047A)** on a **1985 1992 Ford F-250/F-350** is a **highly recommended preventive maintenance task** that offers significant long-term benefits. The **pros far outweigh the cons**, as it:

- **Prevents expensive wheel bearing and differential failures**.

- **Extends the life of critical drivetrain components**.

- **Improves safety and driving smoothness**.

- **Is relatively inexpensive compared to potential repair costs**.

- **Buying from reputable sources**.

- **Following proper installation procedures**.

- **Inspecting related components during service**.

**If the seal is already failing (visible grease leaks, grinding noises, vibration), replacing it should be a priority.** If it s still in good condition but approaching **50,000 100,000 miles**, replacing it **proactively** is a smart investment to avoid future breakdowns.

---

### **Final Recommendation**

You notice **grease leaks, grinding noises, or vibration** from the rear wheels.

The truck has **over 50,000 miles** and the seal hasn t been replaced recently.

You re performing **routine heavy-duty truck maintenance** (every 50,000 100,000 miles).

- **RockAuto** ( www.rockauto.com (https://www.rockauto.com))

- **1A Auto** ( www.1aauto.com (https://www.1aauto.com))

- **Local Ford dealerships or auto parts stores** (to ensure authenticity).

- **Use a seal installer tool** to avoid damaging the new seal.

- **Replace the wheel bearing** if it shows signs of wear.

- **Change the differential fluid** if it s old or contaminated.

- **Torque the wheel nut to specification** (typically **80 100 ft-lbs** for these trucks).

**If unsure about installation, have a mechanic perform the job** the cost of labor is **far cheaper than a seized wheel bearing or failed differential**.

**Bottom Line:** This is a **cost-effective, low-risk upgrade** that will **save you money and headaches** in the long run. Don t wait until the seal fails completely replace it **before** it causes major damage.

Details:

The part number is 370047A, and the manufacturer Ford. These high-quality seals are essential for maintaining the performance and longevity of your vehicles transmission system. This lot includes rear inner wheel seals for specific years and model's of Ford F250 F350 trucks. The seals are made by Federal Mogul and compatible with automatic transmissions.

part #: 370047a prices

• $12.99-$39.95

specifications autotransmissionsgo:

• for models: F250, F350
• for makes: Ford
• for years: 1985-1999
• mpn: 370047a
• type: Automatic Transmission
• items included: Seal
• types: F 250, F 350
• company: Federal Mogul
• years: 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
• country of origin: United States

offer autotransmissionsgo:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1
• started: April 11, 2026

payments autotransmissionsgo:

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

general autotransmissionsgo:

• condition: New
• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission

returns autotransmissionsgo:

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

shipping autotransmissionsgo:

• cost: $8.46
• transit: 5-12 Days
• class: Standard
• type: Calculated
• carrier: USPS
• service: USPS Ground Advantage

seller autotransmissionsgo:

• rating: 99.5%
• # reviews: 911
• city: Dawsonville, Georgia

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