--- product_id: 91960423 title: "National 4278 Differential Pinion Seal for 1999 - 2022 Ford F-150" brand: "national" price: "87.61 DT" currency: TND in_stock: true reviews_count: 13 category: "National" url: https://www.desertcart.tn/products/91960423-national-4278-differential-pinion-seal-for-1999-2022-ford-f store_origin: TN region: Tunisia --- # High-temp resistant to 400°F Fits 1999-2022 Ford F-150 & more Spring-loaded multi-lip design National 4278 Differential Pinion Seal for 1999 - 2022 Ford F-150 **Brand:** national **Price:** 87.61 DT **Availability:** ✅ In Stock ## Summary > 🚀 Seal the deal with National – where durability meets precision! ## Quick Answers - **What is this?** National 4278 Differential Pinion Seal for 1999 - 2022 Ford F-150 by national - **How much does it cost?** 87.61 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/91960423-national-4278-differential-pinion-seal-for-1999-2022-ford-f) ## Best For - national enthusiasts ## Why This Product - Trusted national brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Fluid Compatibility:** Works seamlessly with a wide range of automotive fluids for versatile repairs. - • **Trusted Legacy Brand:** National’s 75+ years of sealing innovation ensures reliability you can count on. - • **Unmatched Heat Endurance:** Operates flawlessly from -40°F to 400°F, built for extreme conditions. - • **Precision Fit for Ford F-150:** Engineered specifically for 1999-2022 Ford F-150 models and compatible vehicles. - • **Advanced Multi-Lip Seal Design:** Spring-loaded for superior sealing and leak prevention under pressure. ## Overview The National 4278 Differential Pinion Seal is a premium, spring-loaded multi-lip seal designed for 1999-2022 Ford F-150s and compatible models. Engineered to withstand extreme temperatures from -40°F to 400°F, it offers exceptional fluid compatibility and reliable performance, backed by National’s 75+ years of industry expertise. ## Description National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today's vehicles. Review: No leaks - Fit in great as the original no more leaks. I put it on a 2009 F-150 2WD rear differential. Review: Old Guy - Perfect fit for my ford pick up pinion seal. ## Features - COMPATIBILITY – Fits 2015-2018 Ford Transit-150; 2015-2018 Ford Transit-250; 2015-2018 Ford Transit-350; 2015-2018 Ford Transit-350 HD; 2004-2004 Ford F-150 Heritage; 1999-1999 Ford E-150 Econoline; 2000-2000 Ford E-150 Econoline; 2001-2002 Ford E-150 Eco - GET THE RIGHT PART -- Before purchasing, please check the “desertcart Confirmed Fit” bar to ensure this part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes. If the “desertcart Confirmed Fit” bar has an “i” in a blue circle, this product has additional notes. Please hover over the “i” on the bar to see notes before making your purchase - Design type: spring loaded; multi-lip - Temperature range: -40°F to 400°F / -40°C to 204°C - Excellent high temperature capabilities - Compatible with wide range of fluids - Delivers quality and reliable performance for every type of repair ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000C5J0U4 | | Best Sellers Rank | #71,120 in Automotive ( See Top 100 in Automotive ) #6 in Automotive Replacement Differential Seals | | Brand | National | | Brand Name | National | | Container Type | Bottle | | Customer Reviews | 4.4 out of 5 stars 210 Reviews | | Global Trade Identification Number | 00724956125289 | | Included Components | Multi Purpose Seal | | Item Form | Grease | | Item Highlight | Compatible with Land Rover Defender 90 1994-1997 | | Item Weight | 9.07 g | | Liquid Volume | 946 ml | | Manufacturer | National | | Material | Fluoroelastomer | | Model Number | 4278 | | Number of Items | 1 | | Package Information | Bottle | | Part Number | 4278 | | Recommended Uses For Product | Automotive | | Specific Uses For Product | Automotive differentials | | UPC | 724956125289 | | Unit Count | 1 Count | | Upper Temperature Rating | 400 °F | ## Product Details - **Brand:** National - **Item Weight:** 9.07 g - **Liquid Volume:** 946 ml - **Material:** Fluoroelastomer - **Package Information:** Bottle ## Images ![National 4278 Differential Pinion Seal for 1999 - 2022 Ford F-150 - Image 1](https://m.media-amazon.com/images/I/712YEXhMTvL.jpg) ![National 4278 Differential Pinion Seal for 1999 - 2022 Ford F-150 - Image 2](https://m.media-amazon.com/images/I/612b5B9ppDL.jpg) ## Questions & Answers **Q: Whats the id and od for this?** A: Thank you for your inquiry. The National Pinion Seal 4278 fits a shaft diameter of 1.812" and the seal OD is 3.096" **Q: Does this fit a 1968 ford 8 inch? Thanks** A: Thank you for the question. Sorry, the National 4278 is not cataloged for this year model vehicle. Additional vehicle information is needed. Please follow catalog listings including fitment notes to determine correct application. ## Customer Reviews ### ⭐⭐⭐⭐⭐ No leaks *by A***J on March 16, 2025* Fit in great as the original no more leaks. I put it on a 2009 F-150 2WD rear differential. ### ⭐⭐⭐⭐⭐ Old Guy *by O***Y on September 14, 2025* Perfect fit for my ford pick up pinion seal. ### ⭐⭐⭐⭐⭐ worked as it should *by B***D on March 4, 2026* worked as it should. no leaks for 25k+ miles ## Frequently Bought Together - National 4278 Differential Pinion Seal for Ford F-150 - Valvoline FlexFill Full Synthetic SAE 75W-140 Gear Oil 1 QT Pouch --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/91960423-national-4278-differential-pinion-seal-for-1999-2022-ford-f](https://www.desertcart.tn/products/91960423-national-4278-differential-pinion-seal-for-1999-2022-ford-f) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-10-05*