National 710005 Transfer Case Output Shaft Seal - Front

Transfer Case Output Shaft Seal for 4WD Applications

The National 710005 transfer case output shaft seal is built for front transfer case service on classic Chevrolet, GMC, Dodge, and Ford 4WD trucks and SUVs. It uses nitrile sealing material and a Redicoat finish to support a reliable seal at the output shaft where transfer case fluid retention matters most.

With dimensions of 1.750 in. inside diameter, 3.066 in. outside diameter, and 0.485 in. width, this oil seal is sized for specific New Process 203 and New Process 205 transfer case applications. The National 710005 is a direct-fit sealing solution for front output shaft service on many K-series, Bronco, F-Series, Ramcharger, and Jimmy models.

Key Features

• Transfer case output shaft seal for front position service
• Nitrile sealing material for fluid sealing performance
• Redicoat surface treatment
• 1.750 in. shaft diameter and 3.066 in. outside diameter
• 0.485 in. width for specified housing bore applications
• National 710005 part number for catalog lookup and ordering

Detailed Description

National has supplied sealing products for more than 75 years, and the 710005 reflects that focus on dimensional accuracy and application-specific fitment. This transfer case output shaft seal is listed as an oil seal in the 710000 series and is engineered around a 1.750 in. shaft, 3.062 in. housing bore, and 0.485 in. width. For buyers searching for a National 710005 transfer case output shaft seal, this part matches front output service needs on vehicles equipped with New Process 205 part-time 4WD 2-speed transfer cases and New Process 203 full-time 4WD 2-speed transfer cases.

This part cross-references BBB Industries 17720 for the same application.

Common Problems This Seal Can Address

• Transfer case fluid leaking from the front output shaft area
• Wet housing or residue around the transfer case seal bore
• Fluid loss caused by worn or hardened sealing lips
• Service replacement during transfer case rebuild or maintenance
• Noise or contamination concerns related to low fluid level

Installation Notes and Tips

• Verify shaft diameter, housing bore, and width before installation.
• Inspect the output shaft surface for grooves or wear that could affect sealing.
• Clean the bore and sealing surface thoroughly before pressing in the seal.
• Confirm transfer case type and position: front output shaft applications only.
• Use the vehicle’s transfer case specification to confirm New Process 203 or 205 fitment.

Quality Assurance

National is a long-established sealing brand with a broad catalog of OE-style replacement components. The 710005 is built to the listed dimensions and material specification for consistent transfer case sealing performance.

Compatible With 1969-1991 Chevrolet Blazer, front; 1975-1980 Chevrolet K10, front; 1975-1980 Chevrolet K20, front; 1977-1986 Chevrolet K30, front; 1975-1980 Chevrolet K5 Blazer, front; 1969-1980 Chevrolet K10 Suburban, front; 1969-1980 Chevrolet K20 Suburban, front; 1976-1979 Chevrolet K10, front; 1976-1979 Chevrolet K20, front; 1976-1979 Chevrolet K30, front; 1976-1979 Chevrolet K5 Blazer, front; 1974-1979 Dodge Ramcharger, front; 1975-1979 Dodge W200, front; 1975-1979 Dodge W300, front; 1975-1977 Dodge W100, front; 1977-1979 Dodge W150, front; 1976-1979 Ford Bronco, front; 1976-1979 Ford F-150, front; 1973-1979 Ford F-250, front; 1973-1974 Ford F-350, front; 1979 Ford F-350, front; 1976 Ford F-100, front; 1970-1980 GMC Jimmy, front; 1979 GMC K1500, front; 1979 GMC K2500, front; 1979 GMC K3500, front; 1979 GMC K1500 Suburban, front; 1979 GMC K2500 Suburban, front; 1979-1980 GMC K1500, front; 1979-1980 GMC K1500 Suburban, front; 1979-1980 GMC K2500, front; 1979-1980 GMC K2500 Suburban, front; 1979-1980 GMC K3500, front; 1987-1991 Chevrolet V3500, front; 1987-1988 Chevrolet V30, front; 1987-1991 GMC V3500, front.