Transmission Front Cover Oil Seal 8-97253550-0 8972535500 For ISUZU NKR77 4JH1 Engine

The Transmission Front Cover Oil Seal (OEM Numbers: 8-97253550-0 / 8972535500) is a premium-quality, direct replacement sealing component designed specifically for ISUZU NKR77 series light-duty trucks equipped with 4JH1 diesel engines.

This precision-engineered oil seal is installed in the transmission front cover, where it seals against the transmission input shaft or related rotating components. Its primary function is to retain transmission fluid within the gearbox while preventing dust, water, and road contaminants from entering.

• OE Quality: Manufactured to strict ISUZU dimensional and material specifications for perfect fit and function
• Oil-Resistant Material: Premium rubber compound resists degradation from transmission fluid, heat, and additives
• Durable Metal Case: Steel outer case ensures secure press-fit into the transmission front cover
• Garter Spring: Maintains constant sealing pressure against the shaft for reliable leak prevention
• Precision Lip: Molded lip ensures tight sealing while minimizing friction and shaft wear
• Prevents Fluid Leaks: Eliminates transmission fluid seepage, maintaining proper lubricant levels
• Protects Transmission Internals: Keeps contaminants out and fluid in, ensuring reliable gear and bearing lubrication
• Direct Replacement: Matches OE seal dimensions, lip profile, and case design
• Essential for Transmission Service: Recommended replacement during front cover, input shaft, or clutch service
• Long Service Life: Engineered for light-duty commercial truck applications

This transmission front cover oil seal is specifically designed for ISUZU light-duty trucks and commercial vehicles. Common applications include:

• ISUZU NKR77 (Light-Duty Trucks)
• ISUZU N Series (NH, NK, NP - as applicable)
• ISUZU FR, FS, FT series (as applicable)

ISUZU 4JH1 Engine Specifications:

• 4-Cylinder, Inline Diesel
• Displacement: 3.0L
• Valvetrain: OHV
• Application: Light-duty trucks and commercial vehicles

Also compatible with various ISUZU models using the same transmission and front cover configuration.

Professional mechanic or transmission specialist installation recommended:

1. Ensure vehicle is safely raised - Use appropriate jack stands or a lift to access the transmission
2. Disconnect battery - Always disconnect the negative terminal before working
3. Drain transmission fluid - Drain the transmission fluid into a suitable container
4. Remove the propeller shaft - Disconnect the propeller shaft from the transmission output shaft
5. Remove the transmission front cover - Unbolt and remove the front cover to access the old seal (if required)
6. Remove the old seal - Carefully pry out the old seal using a seal puller; avoid damaging the housing bore or shaft surface
7. Clean the housing bore - Thoroughly clean the seal bore and shaft surface; remove all old seal residue and debris
8. Inspect the shaft - Check the transmission input shaft surface for wear, scoring, or corrosion; replace if damaged
9. Lubricate the new seal - Apply clean transmission fluid to the seal lip and outer case
10. Install the new seal - Press the new seal evenly into the housing bore using a proper seal driver; ensure it is fully seated
11. Check seal orientation - Ensure the seal lip faces the correct direction (toward the fluid side)
12. Reinstall the front cover - If removed, reinstall the cover with a new gasket; torque bolts to specification
13. Reconnect the propeller shaft - Align match marks made during removal; reconnect universal joints and flanges
14. Refill transmission fluid - Fill with the correct grade and quantity of transmission fluid
15. Start and test - Start the engine and check for fluid leaks at the transmission front cover area
16. Road test - Test drive to verify proper transmission operation and no leaks

• Material Verification: Confirms rubber compound and metal case meet ISUZU oil resistance and durability specifications
• Dimensional Inspection: Inner diameter, outer diameter, and thickness verified within OEM tolerances
• Lip Profile Inspection: Seal lip geometry checked for proper sealing and shaft contact
• Spring Tension Testing: Garter spring tension verified for consistent sealing pressure
• Visual Inspection: 100% checked for molding defects, cracks, or surface imperfections
• Packaged Safely: Protected and packaged to prevent damage during transit

• Neutral export packing or customized packaging available
• Carton or wooden case for safe transportation
• Fast delivery for stock items
• Shipping by Express Air or Sea