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🔧 Seal the deal with confidence—because your Ford deserves the best!
The National 4278 Differential Pinion Seal is a premium, spring-loaded multi-lip seal designed for select Ford Transit and F-150 models (2015-2018). Engineered to withstand extreme temperatures from -40°F to 400°F and compatible with various automotive fluids, it ensures leak-free, reliable differential protection. Trusted by professionals and backed by over 75 years of National’s sealing expertise, this seal delivers precision fit and long-lasting performance for your vehicle’s drivetrain.
| ASIN | B000C5J0U4 |
| Best Sellers Rank | #59,504 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Differential Seals |
| Brand Name | National |
| Container Type | Bottle |
| Customer Reviews | 4.5 4.5 out of 5 stars (188) |
| Global Trade Identification Number | 00724956125289 |
| Included Components | Multi Purpose Seal |
| Item Form | Grease |
| Item Weight | 0.02 Pounds |
| Liquid Volume | 946 Milliliters |
| Manufacturer | National |
| Recommended Uses For Product | Automotive |
| UPC | 724956125289 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 400 Degrees Fahrenheit |
O**Y
Old Guy
Perfect fit for my ford pick up pinion seal.
B**D
worked as it should
worked as it should. no leaks for 25k+ miles
A**O
Bien.
J**.
fit fine
havent rechecked for leeks
B**N
seal
works well, very cost effective
A**J
No leaks
Fit in great as the original no more leaks. I put it on a 2009 F-150 2WD rear differential.
G**E
Installed on Sterling 10.5" rear. Fits, works
Installed on Sterling 10.5" rear. Fits, but the flange seems a little too small for my liking. I have installed Timken seals in the past on these rear ends and the fit seemed better with a wider flange. So far seems to work; no signs of leakage. If it holds up reasonably well I will update to 4 stars. But I would not recommend this over the Timken based on my own experience.
D**R
05 Ford F150 Fx4
This fit my 2005 Ford F150 Fx4 has held up for a while now
S**S
Met our needs, great price
9**T
Probably a good seal, I’ll never know since it doesn’t fit my axle
A**A
Yes this item is an oil seal that fits a 9.75 diff on a ford f150. I checked all that. But the listing doesnt specify which oil seal. This oil seal is for the main drive shaft into the differential. Not for covering the rear diffs wheel bearings. It is a pinion seal A quick google check of the item number also will confirm this with other sellers.
Trustpilot
2 weeks ago
2 days ago