SKF 18782 Differential Pinion Seal - Rear
OE Quality 60-Day Returns
SKF

SKF 18782 Differential Pinion Seal - Rear

Brand SKF 18782
Position Rear
Fits Mazda · 5 vehicles

Nitrile sealing surface. Helps keep lubricants in and contaminants out.

Precision seal design. Made with premium materials for the right application fit.

SKF seal heritage. Built on decades of seal engineering and development.

Cross-references 145818782, 975918782 and CHR 18782 for the same application. See all 4.

$28.10Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $28.10
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Differential Pinion Seal options

SKF 18782 Differential Pinion Seal

SKF 18782 is a differential pinion seal built for rear driveline sealing where lubricant retention and contamination control matter. It is specified for 1987-1991 Mazda RX-7 rear limited slip differential applications and uses a nitrile sealing surface for dependable contact at the shaft.

Key Features

  • Fits 1987-1991 Mazda RX-7, rear limited slip differential
  • Nitrile sealing surface type for oil-resistant sealing performance
  • Outside diameter: 3.077 in.
  • Shaft diameter: 1.890 in.
  • Width: 0.551 in.
  • SKF part number 18782 for direct identification

Detailed Description

This SKF differential pinion seal is designed for the rear differential pinion area, where it helps maintain proper lubricant containment at the shaft interface. The seal dimensions are engineered around a 1.890-inch shaft diameter, 3.077-inch outside diameter, and 0.551-inch width, making dimensional verification straightforward before service. For Mazda RX-7 rear limited slip differential service, SKF 18782 provides a precise sealing solution backed by SKF’s long history in seal design and material development.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

  • Differential gear oil seepage at the pinion seal area
  • Contamination entering the rear differential housing
  • Seal wear from age, heat, and driveline movement
  • Loss of lubricant that can affect differential operation
  • Service replacement for a worn Mazda RX-7 rear pinion seal

Installation Notes and Tips

Confirm shaft diameter, outside diameter, and seal width before installation. Inspect the pinion yoke and sealing surface for grooves, corrosion, or damage that could affect sealing performance. Clean the housing bore thoroughly and install the seal squarely to avoid distortion. Verify differential fluid level after service and check for leaks during road testing.

Quality Assurance

SKF designs and manufactures seals to specific application requirements using premium materials and established bonding techniques. The brand has a long track record in shaft seal development, and SKF 18782 is produced to support long service life and reliable sealing in driveline applications.

This part fits 5 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1991MazdaRX-71.3LR2RearLimited Slip Diff.
1990MazdaRX-71.3LR2RearLimited Slip Diff.
1989MazdaRX-71.3LR2RearLimited Slip Diff.
1988MazdaRX-71.3LR2RearLimited Slip Diff.
1987MazdaRX-71.3LR2RearLimited Slip Diff.
Directly replaces or cross-references 4 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
145818782975918782CHR 18782P090271650