Transmission Top Gear Shaft 8-97252924-1 8972529241 For ISUZU MYY5T NPR With 4JH1 3.0L Diesel — OEM 28-Tooth Input Shaft

The Transmission Top Gear Shaft (Input Shaft) with OEM numbers 8-97252924-1 and 8972529241 is a verified direct-fit replacement for the ISUZU MYY5T manual transmission, commonly found in ISUZU NPR and NKR series trucks equipped with the 4JH1 3.0L diesel engine. As the primary input shaft of the transmission, this component is responsible for receiving torque from the clutch and transferring it to the transmission's gear train, playing a pivotal role in the management of power from the engine to the wheels.

• Real Shop Test Data: Precision-engineered 28-tooth input shaft with 28T gear specification — verified against ISUZU OEM specifications
• Proven Durability: Constructed from high-strength, wear-resistant steel to withstand constant stress of gear shifting and heavy-duty torque loads — rated for 300,000+ km under normal operation
• Installation Success Rate: 99% direct replacement fitment — confirmed across thousands of repair orders for ISUZU MYY5T transmissions
• OEM Cross-Reference Verified: Replaces 8-97252924-1, 8972529241

If your transmission top gear shaft is failing, you may experience one or more of the following symptoms:

• Unusual Transmission Noises: Whining, grinding, or clunking sounds from the transmission, especially in gear — indicates worn gear teeth or bearings
• Difficulty Shifting Gears: Hard to engage or disengage gears, accompanied by grinding noises — the input shaft is not spinning freely
• Transmission Slipping: Engine RPM rises but vehicle does not accelerate proportionally — worn gear teeth are not engaging properly
• Vibration Through Gear Lever: Noticeable vibration felt through the gear shift lever during operation
• Metal Shavings in Transmission Oil: Visible metallic particles in the transmission fluid during servicing — indicates severe internal wear

Our manufacturing and inspection processes ensure every transmission top gear shaft meets or exceeds ISUZU OEM standards.

• The MYY5T transmission must be removed from the vehicle and disassembled
• Inspect all bearings, synchronizers, and gears for wear — replace as necessary
• Use new seals and gaskets during reassembly
• CRITICAL: Refer to the ISUZU workshop manual for correct disassembly and reassembly procedures

1. Remove the MYY5T transmission from the vehicle
2. Disassemble the transmission to access the top gear shaft
3. Remove the old shaft and inspect the mating gears and bearings for wear
4. Clean the transmission housing and all components thoroughly
5. CRITICAL: Install the new top gear shaft with new bearings and seals
6. Ensure correct gear alignment and end-play as specified in the workshop manual
7. Reassemble the transmission following the correct sequence and torque specifications
8. Refill with the correct transmission fluid (refer to ISUZU workshop manual for specifications)
9. Reinstall the transmission and test drive to verify smooth gear operation

• Inspection: During transmission service or if unusual noises / shifting issues appear
• Replacement: Immediately if failure symptoms appear. Recommended during major transmission overhauls
• Note: The MYY5T manual transmission is common in NPR trucks and is a critical drivetrain component — proactive maintenance is essential

• Packaging: Each top gear shaft is securely packed in protective packaging
• Single Package Weight: Approx. 2.5 kg
• Packaging Options: Neutral Box / Color Box / Custom Brand Package
• MOQ: Small quantity accepted; quantity discounts available
• Delivery Time: 15-20 days after deposit
• Suitable for: Wholesale distributors, transmission rebuild shops, truck repair facilities, and fleet owners