National 7216 Differential Pinion Seal - Rear Outer

National 7216 Differential Pinion Seal

National 7216 is a differential pinion seal built for Chrysler axle applications that use an 8.75 inch ring gear and a rear outer seal position. With a leather sealing material and precise inch and metric dimensions, it supports a proper seal at the pinion area where gear oil retention is critical.

• Part number: 7216
• Part description: oil seal for driveline and axle sealing systems
• Inside diameter: 1.875 in. / 47.630 mm
• Outside diameter: 3.110 in. / 78.990 mm
• Flanged outside diameter: 3.266 in. / 82.956 mm
• Thickness/width: 0.500 in. / 12.700 mm
• Housing bore: 3.105 in. / 78.870 mm
• Material: leather
• Series: 7000, Type 47

Fitment Details

Compatible with Chrysler and Dodge rear outer pinion seal applications listed below. This part cross-references Four Seasons (e.g., 18912, 46162) for the same application.

• Fits 1966-1968 Chrysler 300, Rear Outer — models with Casting # 742 and 8.75 inch Ring Gear for Chrysler Axle applications.
• Fits 1966-1968 Chrysler Imperial, Rear Outer — models with Casting # 742 and 8.75 inch Ring Gear for Chrysler Axle applications.
• Fits 1966-1968 Chrysler New Yorker, Rear Outer — models with Casting # 742 and 8.75 inch Ring Gear for Chrysler Axle applications.
• Fits 1966-1968 Chrysler Newport, Rear Outer — models with Casting # 742 and 8.75 inch Ring Gear for Chrysler Axle applications.
• Fits 1966-1968 Chrysler Town & Country, Rear Outer — models with Casting # 742 and 8.75 inch Ring Gear for Chrysler Axle applications.
• Fits 1966-1968 Dodge Dart, Rear Outer — models with Casting # 742 and 8.75 inch Ring Gear for Chrysler Axle applications.
• Fits 1966-1968 Dodge Monaco, Rear Outer — models with Casting # 742 and 8.75 inch Ring Gear for Chrysler Axle applications.
• Fits 1955-1965 Chrysler 300, Rear Outer — vehicles with 8.75 inch ring gear and Chrysler Axle.
• Fits 1958-1965 Chrysler Imperial, Rear Outer — vehicles with 8.75 inch ring gear and Chrysler Axle.
• Fits 1951-1956 Chrysler Imperial, Rear Outer — vehicles with 8.75 inch ring gear and Chrysler Axle.
• Fits 1951-1965 Chrysler New Yorker, Rear Outer — vehicles with 8.75 inch ring gear and Chrysler Axle.
• Fits 1951-1965 Chrysler Newport, Rear Outer — vehicles with 8.75 inch ring gear and Chrysler Axle.
• Fits 1951-1965 Chrysler Town & Country, Rear Outer — vehicles with 8.75 inch ring gear and Chrysler Axle.
• Fits 1965 Dodge Dart, Rear Outer — vehicles with 8.75 inch ring gear and Chrysler Axle.
• Fits 1960-1962 Dodge Dart, Rear Outer — vehicles with 8.75 inch ring gear and Chrysler Axle.
• Fits 1965 Dodge Monaco, Rear Outer — vehicles with 8.75 inch ring gear and Chrysler Axle.
• Fits 1961 Dodge Lancer, Rear Outer — vehicles with 8.75 inch ring gear and Chrysler Axle.
• Fits 1955-1959 Dodge Lancer, Rear Outer — vehicles with 8.75 inch ring gear and Chrysler Axle.

What This Seal Helps Address

• Gear oil seepage at the differential pinion area
• Wet housing or driveline contamination around the rear outer seal
• Seal wear on Chrysler axle assemblies with an 8.75 inch ring gear
• Service replacement needs on classic Chrysler 300, Imperial, Newport, and Dodge Dart applications
• Leak-related maintenance on rear axle sealing systems

Installation Notes and Tips

Verify the housing bore, shaft diameter, and seal dimensions before installation. Clean the sealing surface and inspect the pinion area for wear, scoring, or contamination that could affect sealing performance. Confirm the axle casting and ring gear specification match the listed Chrysler and Dodge fitment before ordering.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop designs for modern and legacy vehicle service needs. Part number 7216 reflects that sealing-focused engineering for driveline and axle applications.