Ecer asks for your consent to use your personal data to:
Personalised advertising and content, advertising and content measurement, audience research and services development
Store and/or access information on a device
Your personal data will be processed and information from your device (cookies, unique identifiers, and other device data) may be stored by, accessed by and shared with 135 TCF vendor(s) and 65 ad partner(s), or used specifically by this site or app.
Some vendors may process your personal data on the basis of legitimate interest, which you can object to by do not consent. Contact our platform customer service, you can also withdraw your consent.
Your message must
be between 20-3,000 characters!
Submit Requirement
Thank You！
Your requirement has been sent. we will contact you quickly!
{"title":"High-Strength Alloy Steel Transmission Shaft with Precision Case-Hardening for","imgUrl":"https:\/\/img.chinax.com\/nimg\/eb\/87\/720ea11daee14a98539da4d8decd-200x200-1\/high_strength_alloy_steel_transmission_shaft_with_precision_case_hardening_for.jpg","attrs":{"Brand Name":"YIMI","Model Number":"ISUZU NKR 4JB1","Certification":"ISO\/TS16949","Place of Origin":"China"}}
{"title":"ISUZU 700P 4HG1T 4HK1T TIMING GEAR 8971200050 1005220-P301","imgUrl":"https:\/\/img.chinax.com\/nimg\/71\/24\/55b57067e5737ee6caf41aa4d9e5-200x200-1\/isuzu_700p_4hg1t_4hk1t_timing_gear_8971200050_1005220_p301.jpg","attrs":{"Model Number":"700P 4HG1T 4HK1T","Place of Origin":"Made in China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"ISUZU NPR 4HG1 TURBO CHARGER ASM 8973267520 704136-0003 8972083520","imgUrl":"https:\/\/img.chinax.com\/nimg\/49\/ea\/f9c869f0e686c77a889c17a84b86-200x200-1\/isuzu_npr_4hg1_turbo_charger_asm_8973267520_704136_0003_8972083520.jpg","attrs":{"Model Number":"NPR 4HG1","Place of Origin":"Made in China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"Durable Isuzu Cars Parts FVR32 6HE1 Gasket Cylinder Head 8943963341","imgUrl":"https:\/\/img.chinax.com\/nimg\/52\/e1\/d6ef2b7634d5d277fb6272e10b8b-200x200-1\/durable_isuzu_cars_parts_fvr32_6he1_gasket_cylinder_head_8943963341.jpg","attrs":{"Model Number":"FVR32 6HE1","Place of Origin":"Made in China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"BL0CK ASM CYL NPR 4HG1 4HG1-T 4HF1 8982045330","imgUrl":"https:\/\/img.chinax.com\/nimg\/b5\/65\/486b19b43672c3be4efdee332582-200x200-1\/bl0ck_asm_cyl_npr_4hg1_4hg1_t_4hf1_8982045330.jpg","attrs":{"Model Number":"NPR 4HG1 4HG1T 4HF1","Place of Origin":"China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"NPR 700P 4HK1 TURBO CHARGE 8980000311 8970786400","imgUrl":"https:\/\/img.chinax.com\/nimg\/bf\/e4\/ab2ffd604bc21336062bab1561b6-200x200-1\/npr_700p_4hk1_turbo_charge_8980000311_8970786400.jpg","attrs":{"Model Number":"NPR 700P 4HK1","Place of Origin":"China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"NPR 4BD2 3.9L CYLINDER HEAD 8971030270","imgUrl":"https:\/\/img.chinax.com\/nimg\/c0\/a8\/bc770a27bfb7fb839df3007b51a1-200x200-1\/npr_4bd2_3_9l_cylinder_head_8971030270.jpg","attrs":{"Model Number":"NPR 4BD2","Place of Origin":"China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
Transmission Shaft 8-97368837-0 For ISUZU NKR 4JB1 — Main Shaft Assembly 8973688370
The Transmission Shaft (Main Shaft / Output Shaft) with OEM numbers 8-97368837-0 and 8973688370 is a verified direct-fit replacement for the ISUZU NKR series light-duty trucks equipped with the 4JB1 2.8L diesel engine and a manual transmission (commonly MSB-5S, MYY-5S, or MSG-5A). This shaft is a critical rotating component inside the gearbox, responsible for transmitting torque from the transmission to the driveshaft and ultimately to the wheels.
The main shaft carries the speed gears, synchronizer hubs, and bearings. It must withstand high torsional loads, bending stresses, and constant gear meshing forces. A worn, bent, or broken transmission shaft causes gear slippage, inability to engage gears, unusual grinding noises, vibration under load, and eventual transmission failure. This OE‑spec replacement shaft is manufactured from high‑strength alloy steel, heat‑treated to achieve the necessary hardness and toughness, and precision‑ground to exact factory tolerances, ensuring smooth power transfer and reliable gearbox operation.
Material & Heat Treatment Verification - Made of 20CrMnTi or equivalent alloy steel, carburized and quenched, surface hardness HRC 58–62, core hardness HRC 30–40 — verified by third‑party metallurgical report.
Dimensional Accuracy - Ground to ISO 7 tolerance class (or equivalent). Critical bearing seat concentricity within 0.02mm, spline profile go/no‑go gauge passed — CMM inspection available.
Proven Durability - Rated service life: 300,000 km under normal driving conditions — based on fleet tracking of 25+ ISUZU NKR trucks.
OEM Cross‑Reference Verified - Replaces ISUZU original part numbers: 8-97368837-0, 8973688370. Also known as 8-97368837-1 (supersession).
Part Number:
8-97368837-0 8973688370
Product Name:
Transmission Shaft
Car Model:
ISUZU NKR
Engine Model:
ISUZU 4JB1
Condition:
100% Brand New
Size:
Standard
Weight:
Standard
Origin:
China Mainland
Main Market:
Middle East, Asia, Africa, South America, North America & Europe
Package:
Neutral Packing Or Make It As Requested
Material:
High-strength aluminum alloy & precision bearings
Cooling Type:
Engine coolant circulation
Installation:
Direct OEM replacement
Quality Standard:
OEM equivalent / ISO quality control
Vehicle & Gearbox Compatibility
Compatible Vehicle Models
ISUZU NKR (all variants: NKR55, NKR57, NKR59, NKR69) with 4JB1 naturally aspirated or turbo diesel
Also fits some ISUZU NPR with 4JB1 (check gearbox model)
May fit ISUZU Faster / KB pickups with 4JB1 and same transmission
Compatible Transmissions (confirm with your vehicle)
MSB-5S (5‑speed, most common)
MYY-5S (5‑speed, heavy duty)
MSG-5A (5‑speed, later models)
Not compatible with 6‑speed or automatic transmissions
Features & Benefits
Feature
Benefit + Verification Signal
High‑strength alloy steel (20CrMnTi)
Withstands high torque — prevents twisting or breakage under heavy loads or sudden clutch engagement. Verified by tensile test (≥ 1000 MPa).
Precision case‑hardening (HRC 58‑62)
Wear‑resistant journal and spline surfaces — resists fretting and spline wear even after 300k km. Hardness profile verified by micro‑hardness tester.
Ground to tight tolerances (≤0.02mm concentricity)
Smooth bearing fit and low vibration — extends bearing and seal life. CMM inspection certificate available per batch.
Straightness ≤0.05mm
No gear whine or rumble — ensures even gear mesh contact. Straightness verified on precision centers with dial gauge.
Magnetic particle inspected
No hidden cracks — 100% of shafts MPI tested to ASTM E709. Cracks as small as 0.5mm detected and rejected.
OEM replacement fit
Direct bolt‑in — matches original spline count, length, and bearing seats. Verified against ISUZU factory drawings.
ISO 9001:2015 manufacturing facility
Consistent quality — each batch traceable with material and process certificates.
Quality Control & Verification
QC Item
Verification Method
Material composition
Spectrometer analysis per batch (C, Mn, Cr, Ti content)
Hardness (surface & core)
Rockwell hardness tester on sample from each heat treatment batch
Case depth
Micro‑hardness traverse from surface inward (0.8‑1.2mm required)
Dimensional inspection
CMM for length, diameter, concentricity; spline go/no‑go gauge
Straightness
Rotating on centers with dial indicator; maximum runout 0.05mm
Surface finish (Ra)
Profilometer on bearing journals — ≤0.4 µm Ra
Magnetic particle inspection
Wet fluorescent MPI on 100% of production (ASTM E709)
Torque to failure (destructive sample)
Occasional batch sample twisted in torsion tester to validate strength margin.
Installation & Maintenance Recommendations
⚠️ Important: Transmission shaft replacement requires complete disassembly of the gearbox. This is a specialized job for experienced transmission technicians.
Before installation:
Verify correct shaft: Count splines, measure length and bearing journal diameters on your old shaft before ordering.
Inspect mating gears and synchronizers: If the old shaft failed (e.g., broken spline, worn journal), also check the gears that run on that shaft for damage.
Replace all bearings and seals while the transmission is open — standard practice.
Prepare shims / adjusting washers if needed for bearing preload (varies by transmission).
Installation steps (high‑level, for professionals):
Shipping dimensions: Approx. 50*15*10 cm, weight approx. 3–5 kg
Inquiry Call‑to‑Action
For Transmission Main Shaft 8-97368837-0 / 8973688370 for ISUZU NKR 4JB1:
✔️ Wholesale price for transmission rebuild shops and distributors
✔️ Single unit sample (verify fitment)
✔️ Bulk order discount & custom packaging
✔️ Material certificate & MPI test report
Please provide your quantity, destination port, and vehicle details (NKR model, year, transmission type/MSB-5S, and a photo of the old shaft if possible). We can confirm fitment before shipping.
Yimi(Guangzhou) Automotive Parts Co,Ltd
located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality automotiv... Yimi(Guangzhou) Automotive Parts Co,Ltd
located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality automotiv...
