FAG SR3479 Differential Pinion Repair Sleeve - Rear

Differential Pinion Repair Sleeve for Rear Axles

The FAG SR3479 differential pinion repair sleeve restores a worn or damaged sealing surface without removing or machining the shaft. Built from heat-treated stainless steel, it helps extend shaft life and supports a tighter seal on rear differential pinion applications.

• Precision repair sleeve for damaged shaft sealing surfaces
• Heat-treated stainless steel construction for durability
• Installs without shaft removal or machining
• Cost-effective alternative to shaft replacement
• Measures 1.523 in shaft diameter, 1.859 in flange diameter, 0.563 in width

Detailed Product Overview

Use the FAG SR3479 when the pinion shaft sealing area has wear, grooves, or surface damage that can lead to fluid leakage. This repair sleeve creates a new sealing surface so the differential seal can run against a smoother contact area. It is a practical solution for rear axle service on vehicles such as Chevrolet Camaro, Chevrolet S10, and GMC Jimmy applications that use the listed ring gear and axle configurations. This part cross-references Dorman HELP 99152 and Timken KWK99152 for the same application.

Key dimensions include 0.438 in width on shaft, 1.016 in installation depth, 0.563 in overall width, 1.523 in shaft diameter, and 1.859 in flange diameter. The SR3479 part number is also referenced as global number 413 3479 100 in fitment notes.

What It Helps Repair

• Rear differential pinion seal leaks caused by shaft wear
• Grooved or scored sealing surfaces on the pinion shaft
• Premature seal failure from repeated contact wear
• Costly shaft replacement when the shaft itself is still serviceable
• Service downtime from machining-based repair procedures

Installation Notes and Fitment

Compatible with rear applications only. Fits 2000-2005 Chevrolet Astro, rear; 2001-2005 Chevrolet Blazer, rear; 1995-2004 Chevrolet S10, rear; 2001-2004 GMC Sonoma, rear; and 1985-2002 Pontiac Firebird, rear. Additional coverage includes many Chevrolet, GMC, Buick, Oldsmobile, Pontiac, Cadillac, and Isuzu rear axle applications listed in the fitment data.

Install the sleeve over the damaged sealing area at the specified depth and verify the shaft diameter before assembly. Clean the shaft thoroughly before installation so the new sealing surface seats correctly. Confirm ring gear size, axle type, and seal application notes before ordering the FAG SR3479.

Quality Assurance

FAG manufactures this repair sleeve as a precision stainless-steel service part for differential repair work. The heat-treated construction supports long-term sealing performance on worn shafts while avoiding machining during the repair process.