HomeDriveline and Axles > Gaskets and Sealing SystemsSKF 15779 Differential Pinion Seal - Rear
Part #: 15779

SKF 15779 Differential Pinion Seal - Rear

Rear
⚙️ 6 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$18.80Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Buick and Oldsmobile, Skylark, Cutlass, F85, and Jetfire
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of the SKF 15779 Differential Pinion Seal

The SKF 15779 differential pinion seal is designed to provide reliable sealing performance for Buick and Oldsmobile vehicles, specifically the Cutlass and Skylark models. Engineered with precision, this seal helps maintain drivetrain integrity by preventing fluid leaks around the differential pinion shaft.

  • Outside diameter: 2.879 inches for precise fitment
  • Shaft diameter: 1.563 inches to match OEM specifications
  • Width: 0.313 inches ensuring proper sealing depth
  • Sealing surface type: Polyacrylate for enhanced durability and resistance
  • Compatible with Buick Cutlass and Oldsmobile Skylark differentials

Technical Details and Specifications

The SKF 15779 differential pinion seal features a polyacrylate sealing surface, which offers excellent resistance to heat and wear, making it suitable for the demanding conditions of automotive driveline systems. With an outside diameter of 2.879 inches and a shaft diameter of 1.563 inches, this seal is engineered to fit tightly around the pinion shaft, preventing differential fluid leaks. The 0.313-inch width ensures the seal sits securely within the housing, maintaining consistent contact with the shaft for effective sealing.

Compatible Vehicles and Applications

This differential pinion seal is compatible with select Buick and Oldsmobile models, including the Cutlass and Skylark. It is designed to replace worn or damaged seals in the driveline and axle systems of these vehicles, helping to maintain proper lubrication and prevent contamination.

  • Prevents differential fluid leaks in Buick Cutlass and Oldsmobile Skylark
  • Maintains driveline lubrication integrity
  • Reduces risk of differential damage due to fluid loss
  • Helps avoid costly repairs related to seal failure

Installation Notes and Tips

When installing the SKF 15779 differential pinion seal, ensure the differential housing and shaft are clean and free of debris. Proper alignment during installation is critical to avoid seal damage. Use appropriate tools to press the seal evenly into place without distortion. Verify the seal’s seating depth matches the original specification to maintain effective sealing performance.

Quality Assurance and Warranty

SKF manufactures the 15779 differential pinion seal to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details may vary, SKF products typically come with a limited warranty against manufacturing defects. Always consult product documentation or authorized SKF resources for warranty information related to this part.

This part fits 6 vehicles. Search below:

YearMakeModelPositionNotes
1963BuickSkylarkRear
1963OldsmobileCutlassRear
1962BuickSkylarkRear
1962OldsmobileCutlassRear
1961BuickSkylarkRear
1961OldsmobileCutlassRear

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.