FORD D7TB-9927936-AF Tank Filler Neck Dentside Fuel Fill Gas Cap

( Manufacturer Part Number: D7TB-9927936-AF ), ( Type: Filler Neck ), ( Oe/oem Part Number: 1977-1979 Ford F150 F250 Fuel Filler Neck Assembly ), ( Placement On Vehicle: Driver Side ), ( Country Of Origin: United States )

Review FORD Gas Tank Filler Neck Dentside Fuel Fill Cap fits F150 F250 F350 1977–1979

The **Ford D7TB-9927936-AF (1977 1979 F-Series Gas Tank Filler Neck with Dentside Fuel Fill Cap)** is a meticulously crafted, high-quality replacement component designed to restore the original functionality and aesthetic appeal of your classic 1977 through 1979 Ford F-150, F-250, or F-350 gasoline-powered truck. This aftermarket part is engineered to fit seamlessly with the iconic fuel system of these mid-'70s muscle trucks, ensuring a secure and leak-free connection while maintaining the iconic "Dentside" fuel fill cap a signature feature of Ford s mid-century engineering. Crafted from durable, corrosion-resistant materials, this filler neck is built to withstand the rigors of daily use, from dusty backroads to long-distance hauls, while preserving the classic look of your rig. The fuel fill cap, featuring the distinctive Dentside design, not only enhances the truck s vintage charm but also provides a tight, reliable seal to prevent fuel evaporation and spills. Whether you're restoring a show-quality classic or simply maintaining the integrity of a well-loved workhorse, this replacement part offers a perfect blend of performance and authenticity, ensuring your Ford s fuel system operates as smoothly and efficiently as the day it left the factory.

### **Pros and Cons of Buying a 1977 1979 Ford F-Series (F150/F250/F350) Gas Tank Filler Neck/Dentside Fuel Fill Cap (Part # D7TB-9927936-AF)**

1. **Compatibility** This part is designed specifically for the 1977 1979 Ford F-Series trucks (F150, F250, F350), ensuring a proper fit without modifications.

2. **Durability** Ford s 1970s-era fuel systems were built to last, and a genuine or high-quality aftermarket filler neck will resist corrosion and wear better than a cheap knockoff.

3. **Easy Installation** The design is straightforward, requiring only basic tools (wrench, socket, and possibly a fuel line cutter if replacing an old one).

4. **Prevents Fuel Leaks** A worn or cracked filler neck can cause fuel spills, which are both a safety hazard and a risk of fire. Replacing it ensures a tight seal.

5. **Improves Fuel Cap Functionality** If the original cap is damaged, a new filler neck allows for proper sealing, reducing fuel odor and potential vapor leaks.

6. **Cost-Effective Upgrade** Compared to a full fuel tank replacement, this part is relatively inexpensive, making it a practical fix for minor wear.

7. **Maintains Resale Value** Keeping the fuel system in good condition can help preserve the truck s value, especially if it s being sold as a project or classic vehicle.

1. **Potential Rust Issues** Older Ford trucks, especially those exposed to salt or moisture, may have rusted fuel lines or mounting points. Inspect the surrounding area before installation.

2. **Fuel Line Compatibility** If the original fuel line is degraded, replacing just the filler neck may not solve deeper issues. A full fuel system flush or replacement might be needed.

3. **Availability of Genuine Parts** While this part is widely available, some buyers may prefer aftermarket alternatives for cost savings. However, aftermarket parts may not always match the quality of OEM components.

4. **Time-Consuming if DIY** If the truck has been neglected, removing the old filler neck (especially if rusted in place) could require extra effort, possibly involving cutting and soldering fuel lines.

5. **Fuel System Contamination Risk** If the old filler neck was leaking, fuel residue could contaminate the new part or surrounding components. A fuel system cleanout may be advisable before installation.

6. **Limited Longevity in Harsh Conditions** Even with a new filler neck, extreme temperatures, road salt, or poor fuel quality can still degrade the part over time.

7. **Potential for Counterfeit Parts** Some sellers may offer fake or low-quality replicas. Buying from a reputable source (Ford dealer, trusted auto parts store, or eBay with verified feedback) is crucial.

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### **Conclusion**

Replacing the gas tank filler neck/dentside fuel fill cap on a 1977 1979 Ford F-Series is a **practical and relatively simple maintenance task** that improves fuel system integrity, prevents leaks, and enhances the truck s reliability. The benefits such as better sealing, reduced fuel odor, and safety outweigh the minor drawbacks, provided the surrounding fuel system is in decent condition.

However, if the truck has extensive rust or other fuel system issues (e.g., cracked fuel lines, a failing fuel pump), addressing those problems concurrently would be wise to avoid recurring problems. For most owners, this part is a **worthwhile investment** that extends the life of the truck s fuel system without major expense.

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### **Recommendation**

- **Buy from a trusted source** (Ford dealer, RockAuto, Summit Racing, or a well-reviewed online retailer) to ensure authenticity and quality.

- **Inspect the fuel system** before installation check for rust, cracks, or leaks in fuel lines, the fuel tank, and the filler neck mounting area.

- **Consider a fuel system flush** if the truck has been sitting unused for a long time, as old fuel or contaminants could damage the new part.

- **Follow proper installation steps** ensure the new filler neck is securely tightened and the fuel cap seals correctly to prevent leaks.

- **If unsure about DIY**, consult a mechanic familiar with classic Ford trucks to avoid mistakes that could lead to fuel spills or improper sealing.

For most owners, this upgrade is a **low-risk, high-reward** fix that keeps the truck running smoothly and safely.

Details:

Good usable filler neck assembly. Plastic shroud is good. Has a cap.Came out of southern truck so no salt.

part #: d7tb9927936 prices

• $45.00-$254.99

specifications fueltanksysteme:

• for models: F150, F250, F350
• for makes: Ford
• for years: 1977-1979
• mpn: D7tb-9927936-af
• type: Filler Neck
• oe/oem part number: 1977-1979 Ford F150 F250 Fuel Filler Neck Assembly
• placement on vehicle: Driver Side
• country of origin: United States

returns fueltanksysteme:

• policy: No Returns

offer fueltanksysteme:

• quantity: 1
• sold: 0
• options: Ship-to-home
• availability: In Stock
• started: March 19, 2026

payments fueltanksysteme:

• wallet: Google-pay
• credit card: Diners-club
• other

general fueltanksysteme:

• Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks
• condition: Used

shipping fueltanksysteme:

• class: Standard
• service: UPS Ground
• type: Fixed
• carrier: UPS
• cost: $0.00
• transit: 4-8 Days

seller fueltanksysteme:

• rating: 100.0%
• city: Colcord, Oklahoma
• # reviews: 2650

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