Help keep lubricant in and dirt and water out of the rear axle with the SKF differential pinion seal, part number 18024. It is a direct-fit replacement for the listed applications, including the 1985-2009 Ford F-250, 1997-2019 Ford Expedition, 1999-2014 Ford F-150, 1999-2010 Ford F-250 Super Duty, 2000-2017 Lincoln Navigator and 2015-2016 Ford Transit-150. See the "Vehicles it fits" section for the full list of vehicles and engines.
- Tested design and materials: Made with a high-quality, tested design and materials for a correct fit.
- Steel garter spring: The garter spring is made from cold-drawn steel wire for fluid retention.
- Rigid metal case: The body is formed from deep-drawn sheet steel, giving it a rigid, stress-resistant metal case.
- Contaminant protection: Designed to protect against dirt and water.
This rear differential pinion seal stays stationary in the differential housing. Its lip rides against the rotating pinion yoke or flange where the driveshaft connects. It may need replacing if you see lubricant seeping around the pinion at the front of the differential housing, oily residue on the housing, or a dropping differential fluid level. Confirm the source of the leak before replacing the seal. Also inspect the yoke's sealing surface, and follow the vehicle service information for pinion nut torque and preload.
SKF has long been a leader in seal design and development. The company invented the first integrated shaft seal in 1928 and has continued to pioneer new designs and bonding techniques since then. Its seals are built to specific designs from premium materials chosen to suit both the application and its environment.
Interchange: 4278.1 · CHR 18024
4278 · 4132852100 · 1L3Z4676A · 975918024 · BL3Z4676A · E5TW4676BA · E5TZ4676A · E5TZ4676B · E8TZ4676B · ESTW4676BA · 145818024 · N18024 · 42781 · CHR18024
This part cross-references / interchanges with the following part numbers:
4278.1, 4278, 4132852100, 1L3Z4676A, 975918024, BL3Z4676A, E5TW4676BA, E5TZ4676A, E5TZ4676B, E8TZ4676B, ESTW4676BA, CHR 18024, 145818024, N18024
Frequently Asked Questions
What does the SKF 18024 pinion seal do?
It seals the rear differential where the rotating pinion exits the housing. This helps keep lubricant in and dirt and water out.
What signs suggest a differential pinion seal may need replacing?
Common signs are lubricant seeping around the pinion at the front of the rear differential, oily residue on the housing, or a low fluid level. Confirm the source of the leak before replacing the seal.
How is this seal constructed?
The body is formed from deep-drawn sheet steel for a rigid, stress-resistant metal case. The garter spring is made from cold-drawn steel wire.
Which vehicles does it fit?
Listed applications include the 1997-2019 Ford Expedition, 1999-2014 Ford F-150 and 2000-2017 Lincoln Navigator. See the "Vehicles it fits" section for the full list.
What should I check when installing it?
Inspect the sealing surface on the pinion yoke. Follow the vehicle service information for pinion nut torque and bearing preload, and to check whether the nut may be reused.
