5-Speed Manual Transmission Assembly with Fully Synchronized Helical Gear Design for ISUZU NKR 4JB1-T Truck

Precision-engineered 5-speed manual transmission assembly delivers reliable power transfer and smooth gear changes, ensuring optimal drivability and performance for ISUZU NKR trucks with 4JB1-T diesel engines.

The Transmission Assembly / Manual Gearbox (OEM Numbers: 8-97373583-0 / 8973735830) is a premium-quality, direct replacement drivetrain component designed specifically for ISUZU NKR series light-duty trucks equipped with the 4JB1-T turbo diesel engine.

• OE Quality: Manufactured to strict ISUZU dimensional and performance specifications for perfect fit and function.
• Fully Synchronized: All forward gears synchronized for smooth, quiet shifting.
• Helical Gear Design: Constant mesh helical gears provide quiet operation and smooth power transfer.
• Durable Construction: High-grade housing materials withstand high torque loads and vibration.
• Two Ratio Options: Available in MSB-5S and MSB-5M configurations to suit different applications.
• Remote Control Operation: Remote operated control rods for precise, responsive shifting.
• Restores Drivability: Eliminates difficult shifting, gear slippage, and noise caused by worn transmissions.
• Direct Replacement: Complete assembly simplifies installation during drivetrain service.
• Long Service Life: Engineered to withstand the rigors of heavy-duty commercial operation.
• Essential Component: Critical for vehicle performance and reliability.
• Proven Design: Widely used in ISUZU NKR and compatible light trucks worldwide.

This transmission assembly is specifically designed for ISUZU light-duty trucks. Common applications include:

• ISUZU NKR - Light-Duty Trucks
• ISUZU NHR - Light-Duty Trucks
• ISUZU NPR (select light-duty models)
• ISUZU ELF - Light to Medium-Duty Trucks
• JMC, JAC, Foton, Dongfeng - Compatible light trucks

• 4-Cylinder, Inline Turbo Diesel
• Displacement: 2.8L (2771cc)
• Max Power: 101 PS / 3,400 rpm
• Max Torque: 22.5 kgm / 2,000 - 3,200 rpm

• MSB-5S - Standard Ratio Configuration
• MSB-5M - Higher Torque Capacity Configuration

Professional installation required. Proper drivetrain service is critical:

1. Disconnect battery - Disconnect the negative battery cable before beginning work.
2. Raise and secure the vehicle - Safely lift the vehicle and support on jack stands.
3. Remove the propeller shaft - Mark the orientation and remove the drive shaft.
4. Support the transmission - Use a transmission jack and secure with a chain or belt.
5. Remove the old transmission - Disconnect clutch linkage, electrical connections, and mounting bolts.
6. Inspect the clutch assembly - Check the clutch disc, pressure plate, and release bearing for wear; replace as a set if necessary.
7. Inspect the flywheel - Check for wear, scoring, or heat damage; resurface or replace if necessary.
8. Inspect the pilot bearing - Replace the pilot bearing in the crankshaft.
9. Clean the bell housing - Thoroughly clean the bell housing and mating surfaces.
10. Prepare the new transmission - Inspect the new transmission and verify it matches the original.
11. Install the new transmission - Position the new transmission and secure with mounting bolts.
12. Reconnect clutch linkage - Connect the clutch slave cylinder and linkage.
13. Reinstall the propeller shaft - Reinstall the drive shaft in the correct orientation.
14. Refill with transmission fluid - Fill with the recommended type and amount of transmission fluid.
15. Adjust clutch free play - Adjust the clutch pedal free play per manufacturer specifications.
16. Reconnect battery - Reconnect the negative battery cable.
17. Test operation - Start the engine and test all gears for smooth engagement.
18. Check for leaks - Inspect the transmission for any oil leakage.
19. Road test - Test drive the vehicle to verify smooth shifting and proper operation.

• Material Verification: Confirms housing and internal component materials meet OE specifications.
• Dimensional Inspection: Gear dimensions, shaft alignment, and housing measurements verified against OEM tolerances.
• Gear Inspection: Gear tooth profile, hardness, and surface finish verified for durability and quiet operation.
• Synchronizer Testing: Synchronizer performance and shift quality verified under simulated operating conditions.
• Leak Testing: 100% pressure-tested for oil seal integrity and leak-free operation.
• Noise and Vibration Testing: Transmission operation verified for smooth, quiet performance.
• Visual Inspection: 100% checked for casting defects, machining flaws, or damage.
• Packaged Safely: Protected and securely 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

For pricing, availability, or bulk purchase of the Transmission Assembly 8-97373583-0 For ISUZU NKR 4JB1-T Truck 8973735830, please contact our sales team for a competitive quote and expert technical support.