532105H400 53210-5H400 Final Drive Gear Set Ring & Pinion 40/6 Case-Hardened Precision Ground Teeth for Hyundai HD65 HD72 Mighty II H250 TD
| Gear Ratio: | 40/6 (≈6.67:1) | Material: | Forged Alloy Steel |
| Surface Treatment: | Case-hardened And Precision Ground | Engine Compatibility: | H250 TD (Turbo Diesel) |
| Transmission: | 5-Speed Manual | Drive Configuration: | 4×2 Rear-wheel Drive |
| Backlash Tolerance: | 0.15–0.25 Mm | OEM Part Number: | 532105H400 / 53210-5H400 |
| High Light: | 40/6 Final Drive Gear Set,Case-Hardened Ring & Pinion,Precision Ground Teeth Crown Wheel |
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The Final Drive Gear Set with OEM number 532105H400 / 53210-5H400 is a direct-fit ring and pinion replacement for Hyundai HD65, HD72 and Mighty II trucks equipped with the H250 TD turbo diesel engine. This gear set is a critical component of the rear axle differential, responsible for transferring engine torque to the wheels at the correct speed reduction ratio.
The ring and pinion set converts the rotational output from the driveshaft into wheel rotation at a reduced speed and increased torque. The 40/6 ratio (approximately 6.67:1) is optimized for heavy-load pulling power while maintaining controllable highway RPM. Proper backlash and tooth contact are essential for quiet operation and gear longevity.
- ConfirmedGear Ratio: 40/6 (≈6.67:1) — confirmed by product listing.
- ConfirmedEngine Compatibility: H250 TD (Hyundai Turbo Diesel, approx. 120 ps / 295 Nm).
- ConfirmedSurface Treatment: Case-hardened and precision ground teeth — per manufacturer spec.
- ConfirmedCertification: ISO/TS16949 — per product listing (verify certificate validity independently).
- PendingBench test data: hardness HRC, backlash tolerance range, noise dB — recommend supplying your own test report.
- PendingInstallation success rate: recommend providing repair order statistics.
- PendingDurability mileage: no independent fleet data available.
- ConfirmedOEM Cross-Reference: Replaces 532105H400 / 53210-5H400; also listed under SAMGONG brand.
- Whining or howling noise from the rear axle, especially during acceleration or deceleration.
- Metal particles or debris in differential oil.
- Excessive backlash or play when rotating the driveshaft.
- Differential oil leaks from the pinion seal.
- Vibration or shudder during acceleration.
| Part Number | 532105H400 |
| Product Name | Final Drive Gear Set |
| Car Model | HD65, HD72, Mighty II |
| Engine Model | H250 TD |
| Condition | 100% Brand New |
| Size | 3145 mm |
| Weight | Standard |
| Origin | China Mainland |
| Main Market | Middle East, Asia, Africa, South America, North America & Europe |
| Package | Neutral packing or made 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 |
|---|---|
| 40/6 Gear Ratio | Optimized for maximum load-moving torque with controllable highway RPM — ratio confirmed by spec. |
| Case-hardened construction | Exceptional wear resistance under heavy loads — surface treatment confirmed. |
| Precision ground teeth | Quiet operation with minimal whine — manufacturing process confirmed. |
| Factory-lapped matched pair | Proper tooth contact and reduced noise — per product description (independent verification recommended). |
| Direct OE replacement | Straightforward differential overhaul — dimensions matched to OE spec. |
| 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 |
- 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 the VIN/chassis number for verification. Do not rely solely on cross-reference numbers.
| QC Item | Verification Method |
|---|---|
| Gear ratio verification | Tooth count: ring 40 / pinion 6 |
| Surface hardness | Rockwell hardness test (HRC spec pending — recommend establishing internal standard) |
| Tooth contact pattern | Prussian blue compound check on lapped pair |
| Backlash measurement | Dial indicator, target 0.15–0.25 mm |
| Dimensional accuracy | CMM against OEM drawing (data pending) |
| Noise test | Run-in bench, dB measurement (spec pending) |
- Remove the rear axle assembly and drain the differential oil.
- Remove the driveshaft, axle shafts and differential carrier.
- Remove the old ring and pinion. Clean the housing thoroughly.
- Install the new pinion with the correct shim (pinion depth gauge required).
- Install the ring gear on the carrier. Set backlash to 0.15–0.25 mm.
- Check the tooth contact pattern with marking compound. Adjust as needed.
- Set carrier bearing preload per OEM spec.
- Refill with the specified gear oil. Perform the break-in procedure.
Change differential oil every 40,000–50,000 km or annually. Inspect for leaks and unusual noise at every service. After any differential repair, re-check backlash and oil level at 1,000 km.
- Neutral export packaging or customized carton/wooden case available.
- Suitable for wholesale distributors, driveline repair workshops and fleet maintenance suppliers.
- MOQ negotiable; samples available for quality verification.
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