Differential Pinion Gear 9-41551029 for ISUZU NPR NKR5 — OEM 9415510290, Z=10 (18mm Bore), Verified Fit
Key Attributes
Product Summary
Direct-fit OEM 9-41551029 differential pinion gear for ISUZU NPR/NKR5. Features Z=10 teeth, 18mm bore, metal construction, and ISO/TS16949 quality. Interchangeable with 9-41551029-1. Neutral or custom packaging available.
Product Details
Differential Pinion Gear 9-41551029
,ISUZU NPR NKR5 Pinion Gear
,OEM 9415510290 Pinion Gear Z=10
Differential Pinion Gear 9-41551029 (OEM 9415510290) — Direct-fit OEM replacement for ISUZU NPR and NKR5 light trucks. 10 teeth (Z=10), 18mm inner bore, interchangeable with 9-41551029-1.
The Differential Pinion Gear with OEM number 9-41551029 is a direct-fit replacement for ISUZU NPR and NKR5 light trucks. This gear is part of the differential assembly, meshing with the side gears to distribute torque to the axle shafts while allowing the wheels to rotate at different speeds during turns.
How It Works: Inside the differential carrier, the pinion gears (also called planet gears) are mounted on a cross pin. They mesh with the side gears (sun gears) connected to the axle shafts. When the vehicle turns, the pinion gears rotate on their own axis, allowing the outer wheel to turn faster than the inner wheel. A worn pinion gear — with chipped teeth, excessive backlash, or surface pitting — causes whining, clunking, or uneven power delivery to the wheels.
- Tooth Count & Bore Confirmed: Z=10 (10 teeth), 18mm inner bore — confirmed by supplier listing for the related 9-41551029-1 number and visible in the product images.
- Fitment Confirmed: Multiple suppliers list the 9-41551029 series for ISUZU NPR / NKR5 applications.
- Material & Certification: Metal construction; ISO/TS16949 certification referenced by one supplier.
⚠️ Suffix Note: Your label shows 9-41551029-J. Public data primarily documents -0 and -1 suffixes. Confirm with the seller whether -J is a packaging code or a distinct variant.
⚠️ Dimensional Data Gap: Outer diameter and thickness are not disclosed in search results. If your rebuild requires exact gear mesh tolerances, request a dimensional drawing.
⚠️ Supplier Data Quality: Some multi-language supplier pages contain machine-translation errors in the specification field. Rely on the OEM number and Z=10 / 18mm bore data rather than translated text.
- Whining or humming noise from the rear axle, especially during turns
- Clunking or metallic knocking when shifting from drive to reverse
- Excessive differential gear backlash (measured during rebuild)
- Visible chipped, worn, or pitted teeth on the pinion gear
- Metal particles in differential fluid
| Part Number | 9-41551029 | Product Name | Differential Pinion Gear |
|---|---|---|---|
| Car Model | ISUZU NPR NKR5 | Engine Model | ISUZU NPR NKR5 |
| Condition | 100% Brand New | Size | Z=10 (10 teeth), 18mm inner bore |
| Weight | Standard | Origin | China Mainland |
| Main Market | Middle East, Asia, Africa, South America, North America & Europe | Package | Neutral Packing or As Requested |
| Warranty | 6 Months | Price & Stock | Please Contact Us for More Information |
| Material | High-strength aluminum alloy & precision bearings | Cooling Type | Engine coolant circulation |
| Installation | Direct OEM replacement | Quality Standard | OEM equivalent / ISO quality control |
| Feature | Benefit + Verification Signal |
|---|---|
| OEM-matched fitment | Direct replacement for worn or warped original disc — OEM number confirmed across multiple suppliers |
| Metal construction | Withstands braking heat and friction — material confirmed by supplier listing |
| Z=10 (10 teeth) | Matches OEM differential gear mesh — confirmed by supplier listing for the related -1 suffix |
| 18mm inner bore | Ensures correct fit on the cross pin — confirmed by supplier data |
| ISO/TS16949 certification (supplier claim) | Indicates manufacturing quality system compliance — referenced by supplier |
| Metal construction | Provides durability under differential load — material specified in supplier listing |
| Brand | Model | Engine Code | Notes |
|---|---|---|---|
| ISUZU | FSR / FSR 500 | 6HE1 | Primary fitment per OEM number |
| ISUZU | FVR / FTR | 6HE1 (verify) | Some cross-applications reported; confirm by VIN |
⚠️ Important Fitment Notes:
- HDA-008 / MC828264 are aftermarket cross-reference numbers, primarily appearing in Mitsubishi Fuso brake booster catalogs. This product is primarily intended for ISUZU FSR 6HE1 fitment; the above numbers are listed for customer cross-comparison.
- If your vehicle is a Mitsubishi Fuso FK/FM with an MC828264 booster, confirm pushrod length and mounting bolt pattern match before ordering. "Short" and "long" pushrod variants exist within the MC828264 family.
- Always provide VIN/chassis number for verification. Do not rely solely on cross-reference numbers.
| QC Item | Verification Method |
|---|---|
| Tooth count | Count teeth on original and compare (10T confirmed) |
| Inner bore diameter | Caliper measurement against original (18mm reference) |
| Tooth profile / surface finish | Visual inspection for pitting, chipping, or abnormal wear |
| Outer diameter | Caliper measurement against original — no catalog data available |
| Material hardness | Request supplier hardness report if critical |
| Packaging integrity | Carton condition check per shipment |
⚠️ IMPORTANT: Differential pinion gear replacement requires disassembly of the differential carrier. Backlash and preload must be reset after reassembly. Professional driveline shop installation is strongly recommended.
- Drain differential fluid. Remove the driveshaft and axle shafts as required.
- Remove the differential carrier from the axle housing.
- Disassemble the differential case. Remove the cross pin and existing pinion gears.
- Clean all components. Inspect side gears, cross pin, and case for wear.
- Install new pinion gear(s) on the cross pin. Verify correct orientation and seating.
- Check gear backlash and tooth contact pattern. Adjust shims as necessary per OEM procedure.
- Reassemble differential case. Set carrier bearing preload per OEM specification.
- Reinstall carrier, axle shafts, and driveshaft. Refill with specified differential fluid.
- Test-drive and listen for abnormal noise during turns.
- Inspect differential fluid for metal particles at every fluid change.
- Replace pinion gears during any differential rebuild if wear, pitting, or chipping is evident.
- Check for abnormal noise during turns at every major service.
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