Product Description

The SPICER 42449 is a genuine OE differential pinion oil seal designed to prevent lubricant loss and contamination at the pinion shaft on rear and front axle differentials. Built from synthetic material, this seal measures 4.29 inches in diameter by 0.39 inches in height and weighs just 0.02 pounds. It meets or exceeds original equipment specifications, making it a direct-fit replacement rather than an aftermarket approximation. Drivetrain technicians and fleet maintenance professionals install this seal during differential rebuilds, pinion bearing replacements, or whenever a worn or leaking pinion seal is identified during service.

The 42449 is suited for differential pinion shaft applications where an OE-specification seal is required. It is appropriate for use in both residential fleet and commercial vehicle drivetrain service scenarios. Technicians performing differential overhauls or addressing pinion seal leaks will find this part fits without modification where the original Spicer seal was used. Refer to your axle or vehicle service manual to confirm fitment before installation.

Key Features

Genuine Spicer OE replacement seal - not an aftermarket substitute
Synthetic material construction for durability and resistance to gear oil degradation
Compact profile: 4.29 x 4.29 x 0.39 inches for precise bore fitment
Meets or exceeds original equipment specifications
Lightweight at 0.02 pounds - no added mass to the assembly

Compatibility

Designed as a genuine OE-style replacement differential pinion oil seal for applications originally equipped with Spicer axle components. Confirm axle model and seal bore dimensions against service documentation before installation.

Installation Notes

Installation should be performed by a qualified drivetrain technician. Drain the differential and relieve any system load before removing the pinion nut and yoke. Use a proper seal driver to seat the new seal evenly in the bore - never drive the seal in unevenly or with impact tools applied directly to the seal face. Refill the differential with the manufacturer-specified lubricant type and quantity after the seal is installed and the yoke is torqued per the axle service manual.

Technical Specifications

Dimensions: 4.29 x 4.29 x 0.39 inches
Material: Synthetic
Weight: 0.02 pounds

Standard Information

Brand: SPICER
Manufacturer Part Number: 42449

Brand	SPICER
MPN	42449

Spicer 42449 Differential Pinion Oil Seal 4.29" Synthetic

Shipping

Specifications

Returns Accepted