Help keep gear lubricant inside the axle and road grime outside with the SKF differential pinion seal, part number 17727. It serves as a replacement for classic Chevrolet and GMC applications, including the 1955-1964 Chevrolet Bel Air, 1956-1962 Chevrolet Corvette, 1959-1964 Chevrolet Impala, 1961-1963 Chevrolet C10 Pickup and 1961-1963 GMC 1000 Series. See the "Vehicles it fits" section for the full list and engine details.
A differential pinion seal closes off the opening where the pinion exits the differential housing. The seal body stays stationary while its lip rides on the rotating pinion assembly, helping retain lubricant and block contaminants. SKF catalogs 17727 for both front and rear positions, depending on the application.
- Rigid metal case: The body is formed from deep drawn sheet steel for a rigid, stress-resistant case.
- Garter spring: The garter springs use cold drawn steel wire and are intended to support fluid retention.
- Contaminant protection: Designed to protect against dirt and water.
- Correct fit: Built with a tested design and quality materials for correct fit.
SKF introduced the first integrated shaft seal in 1928 and has kept developing seal designs and bonding techniques since then. SKF builds each seal to a specific design and selects materials for the application and its operating environment.
If lubricant is seeping or dripping around the pinion end of the differential, a worn pinion seal may be the cause. Diagnose the leak source before replacing parts.
Interchange: CHR 17727
CHR17727 · 2067192 · C6818 · 975917727 · 3705725 · 3707355 · 3714786 · 3714795 · 3720002 · 3741786 · 3776800 · 3865358 · 464140 · 145817727 · 49741
This part cross-references / interchanges with the following part numbers:
2067192, C6818, 975917727, CHR 17727, 3705725, 3707355, 3714786, 3714795, 3720002, 3741786, 3776800, 3865358, 464140, 145817727, 49741
Frequently Asked Questions
What does a differential pinion seal do?
It seals the opening where the pinion exits the differential housing. The seal body stays stationary while its lip rides on the rotating pinion assembly, helping keep lubricant in and dirt and water out.
Which vehicles does SKF 17727 fit?
It is listed for classic Chevrolet and GMC applications, including the 1955-1964 Chevrolet Bel Air, 1956-1962 Chevrolet Corvette and 1961-1963 GMC 1000 Series. See the "Vehicles it fits" section for the full list.
What are signs a pinion seal may need replacing?
Lubricant seepage or drips around the pinion end of the differential, or a dropping fluid level, may point to a worn pinion seal. Confirm the leak source first, since other seals and gaskets can also leak.
How is the SKF 17727 seal constructed?
SKF forms the case from deep drawn sheet steel to create a rigid, stress-resistant body. The garter springs use cold drawn steel wire.
Is this seal for the front or rear differential?
SKF catalogs 17727 for both front and rear positions, depending on the application. Check the "Vehicles it fits" section for the listing that matches your vehicle.
