🛡️ Seal the deal with confidence—keep your Ford running flawless!
The National 4278 Differential Pinion Seal is a precision-engineered, spring-loaded multi-lip seal made from durable fluoroelastomer. Designed specifically for select Ford Transit and F-150 models (1999-2018), it offers exceptional resistance to extreme temperatures (-40°F to 400°F) and a wide range of automotive fluids, ensuring reliable, leak-proof differential performance and long-term durability.
| Material | Fluoroelastomer |
| Brand | National |
| Package Information | Bottle |
| Liquid Volume | 946 Milliliters |
| Item Weight | 0.02 Pounds |
| Recommended Uses For Product | Automotive |
| Upper Temperature Rating | 4E+2 Degrees Fahrenheit |
| Specific Uses For Product | Automotive differentials |
| Item Form | Grease |
| Global Trade Identification Number | 00724956125289 |
| Manufacturer | National |
| Unit Count | 1.0 Count |
| UPC | 724956125289 |
| Number of Items | 1 |
| Item Weight | 0.32 ounces |
| Product Dimensions | 4 x 0.75 x 0.1 inches |
| Country of Origin | Mexico |
| Item model number | 4278 |
| Manufacturer Part Number | 4278 |
D**R
05 Ford F150 Fx4
This fit my 2005 Ford F150 Fx4 has held up for a while now
D**K
Worked great well pleased
Installed this seal worked great no more leak
A**J
No leaks
Fit in great as the original no more leaks. I put it on a 2009 F-150 2WD rear differential.
R**.
It did not fit
F350 super duty 2002
J**4
Fit 2003 f250 xlt 6.0
The one advance gave me didn’t fit, order this , fit like a glove. Next day shipping was really nice!
L**I
Good
Good
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**E
Perfect replacement.
Exact fit replacement. Easy to install.
Trustpilot
4 days ago
2 weeks ago
