Keep your rear differential's gear oil sealed in and road grime out with the SKF Differential Pinion Seal 20880. This rear pinion seal drops in as a direct-fit replacement across a broad GM lineup, including the 2003-2009 Hummer H2, 2008-2010 Hummer H3, 1999-2013 Chevrolet Silverado 1500, 2001-2013 GMC Sierra 2500 HD, and 2009-2014 Cadillac Escalade — see the Buyer's Guide tab for the full list of 84 applications.
Mounted at the rear differential where the driveshaft yoke meets the pinion, the seal body stays stationary while its lip rides against the rotating pinion shaft, holding lubricant inside the housing and blocking outside dirt and water.
- Rigid steel case: deep-drawn sheet steel forms a stress-resistant metal body.
- Cold-drawn garter spring: steel-wire garter spring keeps the lip loaded against the shaft for superior fluid retention.
- Contaminant defense: designed for superior protection against dirt and water.
- Tested fit: made with high-quality tested design and materials for correct fit.
SKF pioneered the first integrated shaft seal in 1928 and builds seals to specific designs using premium materials suited to each application and environment. If gear oil is weeping at the pinion/driveshaft yoke, replacing a worn pinion seal with the 20880 restores the sealing surface.
Interchange: 710507 · 4133085100 · 26064029 · 27SS3085
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this seal do?
The SKF 20880 is a rear differential pinion seal. It stays stationary while its lip rides on the rotating pinion shaft, keeping the differential's gear oil in and dirt and water out.
How do I know my pinion seal needs replacing?
Signs it may need replacing include gear oil weeping at the pinion/driveshaft yoke or oil on the underside of the differential. Diagnose the source of the leak before replacing.
Will this fit my vehicle?
It's a direct-fit replacement for many GM trucks and SUVs, including Hummer H2/H3, Chevrolet Silverado, GMC Sierra, and Cadillac Escalade. Check the Buyer's Guide tab for the full list of 84 applications.
What is the seal case made of?
The body is deep-drawn sheet steel, forming a rigid, stress-resistant metal case, and it uses a cold-drawn steel-wire garter spring to load the sealing lip for fluid retention.
What other part numbers does the 20880 replace?
It cross-references the following interchange numbers: 710507, 4133085100, 26064029, and 27SS3085.
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