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Yimi (Guangzhou) Automotive Parts Co, Ltd

  • China,Guangzhou
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China Final Pinion Oil Seal 40×74×9/15.5 mm NBR Metal Case Dual-Lip TB Type for ISUZU
China Final Pinion Oil Seal 40×74×9/15.5 mm NBR Metal Case Dual-Lip TB Type for ISUZU

  1. China Final Pinion Oil Seal 40×74×9/15.5 mm NBR Metal Case Dual-Lip TB Type for ISUZU
  2. China Final Pinion Oil Seal 40×74×9/15.5 mm NBR Metal Case Dual-Lip TB Type for ISUZU
  3. China Final Pinion Oil Seal 40×74×9/15.5 mm NBR Metal Case Dual-Lip TB Type for ISUZU
  4. China Final Pinion Oil Seal 40×74×9/15.5 mm NBR Metal Case Dual-Lip TB Type for ISUZU
  5. China Final Pinion Oil Seal 40×74×9/15.5 mm NBR Metal Case Dual-Lip TB Type for ISUZU

Final Pinion Oil Seal 40×74×9/15.5 mm NBR Metal Case Dual-Lip TB Type for ISUZU

  1. MOQ: 20 PCS
  2. Price: Negotiable
  3. Get Latest Price
Outer Diameter 74 mm
Delivery Time 5-8 Work Days
Material NBR (Nitrile Butadiene Rubber) + Metal Case
Packaging Details Neutral Package or as customers’ request
Payment Terms T/T
OEM Part Number 8-94318520-2 / 8943185202
Position Front Differential Pinion
Supply Ability 10000 pcs/month
Engine Compatibility 4ZE1 / 4JH1 / 4JB1 / 4JA1
Thickness 9 / 15.5 mm
Inner Diameter 40 mm
Seal Type TB Type, Dual-Lip
Model Number NPR NKR77
Certification ISO/TS16949
Brand Name YIMI
Place of Origin CHINA

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  1. Product Details
  2. Company Details

Product Specification

Outer Diameter 74 mm Delivery Time 5-8 Work Days
Material NBR (Nitrile Butadiene Rubber) + Metal Case Packaging Details Neutral Package or as customers’ request
Payment Terms T/T OEM Part Number 8-94318520-2 / 8943185202
Position Front Differential Pinion Supply Ability 10000 pcs/month
Engine Compatibility 4ZE1 / 4JH1 / 4JB1 / 4JA1 Thickness 9 / 15.5 mm
Inner Diameter 40 mm Seal Type TB Type, Dual-Lip
Model Number NPR NKR77 Certification ISO/TS16949
Brand Name YIMI Place of Origin CHINA
High Light 40×74×9/15.5 mm Final Pinion Oil Seal ,NBR Metal Case Differential Pinion Seal ,Dual-Lip TB Type Pinion Shaft Seal
ISUZU UCS NPR NKR77 UBS Final Pinion Oil Seal 8-94318520-2 8943185202 OEM Fit
Product Overview

Final Pinion Rubber Oil Seal 8-94318520-2 8943185202 for ISUZU UCS UBS D-MAX TFS Trooper — Verified OEM Fit 40×74×9/15.5 mm NBR Differential Pinion Seal

This oil seal is a critical differential sealing component installed at the front differential pinion, responsible for retaining gear oil within the differential housing and preventing dust, water, and debris from entering the pinion bearing assembly.

Working Principle

The final pinion oil seal creates a dynamic seal between the rotating pinion shaft and the stationary differential housing. The dual-lip TB-type design features a primary sealing lip that maintains contact with the pinion flange surface under spring tension, and a secondary dust lip that blocks water, mud, and debris. The NBR (Nitrile Butadiene Rubber) construction provides excellent resistance to gear oil, high temperatures, and compression set.

Failure Symptoms
  • Gear oil leakage at the differential pinion — visible oil traces on the differential housing, driveshaft, or under the vehicle
  • Oil accumulation on the pinion flange — oil being thrown outward by the rotating pinion flange indicates seal lip failure
  • Differential noise or vibration — oil loss leads to insufficient lubrication, causing whining or rumbling from the differential
  • Water or mud intrusion — damaged dust lip allows contaminants into the pinion bearing cavity, causing rust and pitting
  • Low differential oil level — repeated oil level drops without visible external leaks indicate seal degradation
Critical Inspection Note: ISUZU service manuals require that the pinion oil seal be replaced, never reused, whenever the pinion flange, yoke, or differential is serviced. The new seal must be installed using a specialized installer tool to ensure it is seated squarely and at the correct depth.
Technical Specifications
Verification Item Data / Standard Source / Method
Part Number (Short) 8-94318520-2 ISUZU OEM Parts Database
Part Number (Long) 8943185202 ISUZU OEM Parts Database
Part Name SEAL; OIL, FINAL PINION ISUZU EPC
Inner Diameter 40 mm Euro4x4parts POS3244 specification
Outer Diameter 74 mm Euro4x4parts POS3244 specification
Thickness 9 / 15.5 mm Euro4x4parts POS3244 specification
Material NBR (Nitrile Butadiene Rubber) + Metal Case Product specification
Seal Type TB Type, Dual-Lip Product specification
Installation Success Rate ≥ 99% Based on repair order tracking
Certification ISO/TS 16949 Third-party system audit
ISUZU Final Pinion Oil Seal 8-94318520-2
Vehicle & Engine Compatibility
Brand Model Chassis Engine Years
ISUZU D-MAX I TFS77 / TFS85 / TFS54 / TFS86 3.0 TD / 2.5 TD 2003-2012
ISUZU D-MAX II TFR / TFS — 2012-2020
ISUZU Trooper / Bighorn UBS55 / UBS69 / UBS73 2.8 TD / 3.1 TD / 3.0 DTi 1986-1998
ISUZU UCS17 UCS17 4ZE1 —
ISUZU Amigo / Rodeo Sport — 4ZE1 1998-
ISUZU Pickup TF / TFR 4JB1 / 4JA1 1988-2002
Important Fitment Notes:
  • This oil seal is designed for the 40×74×9/15.5 mm front differential pinion application
  • The 8-94318520-2 is the -2 suffix version of the 8-94318520 series
  • Always replace the pinion oil seal whenever the pinion flange, yoke, or differential is serviced
  • For right-hand drive (RHD) vehicles, verify clearance and orientation
Fitment Verification: To ensure 100% accurate matching, please provide the VIN or chassis number before ordering. We will verify it through the ISUZU global EPC system.
Features & Benefits
Feature Benefit + Verification Signal
NBR Rubber + Metal Case Construction Excellent resistance to gear oil, high temperatures, and compression set — verified by material certificate and ASTM D471 immersion testing
Dual-Lip TB Type Design Primary sealing lip retains gear oil while secondary dust lip blocks water and debris — verified by product specification and functional testing
OEM-Exact 40×74×9/15.5 mm Dimensions Precision-matched to the ISUZU UCS/UBS/D-MAX differential pinion — direct press-fit installation without modification — verified by CMM dimensional inspection
Spring-Loaded Lip Maintains consistent contact pressure on the pinion flange surface for reliable sealing at all operating speeds — verified by functional testing
ISO/TS 16949 Quality System Full traceability with material certificates and batch inspection reports — third-party certified
Quality Control
QC Item Verification Method / Standard
Inner Diameter (40 mm) CMM, 100% inspection
Outer Diameter (74 mm) CMM, 100% inspection
Thickness (9 / 15.5 mm) CMM, 100% inspection
Lip Geometry Angle Optical comparator, 100% inspection
Fluid Immersion Resistance ASTM D471 — 70h @ 100°C in gear oil
Compression Set ASTM D395 — 70h @ 100°C
Batch Traceability Material lot number + production date
Installation Guidelines
IMPORTANT: Differential service must be performed by a qualified technician. Always support the vehicle on a hoist and drain the differential oil before removing the pinion seal. Never reuse old oil seals.
  1. Preparation: Raise the vehicle on a hoist. Drain the differential oil into a suitable container. Remove the driveshaft from the pinion flange.
  2. Removal: Remove the pinion flange retaining nut and washer. Remove the pinion flange using a puller. Use a seal puller or pry bar to remove the old oil seal.
  3. Inspection: Inspect the pinion flange sealing surface for wear, scoring, or pitting. Inspect the pinion bearing for wear or damage.
  4. Cleaning: Clean the differential housing bore and pinion shaft thoroughly. Remove all old seal material and gear oil residue.
  5. Installation: Coat the new oil seal lip with clean gear oil. Use a seal driver or socket that matches the seal outer diameter to press the seal into the housing until fully seated.
  6. Flange Installation: Reinstall the pinion flange. Install the retaining nut and tighten to the specified torque per the ISUZU workshop manual.
  7. Final Check: Check the differential oil level and top up as needed. Verify no oil leakage at the seal.
  8. Road Test: Lower the vehicle and perform a road test to verify differential operation and check for leaks.
Maintenance Schedule
  • Every 10,000 km: Inspect oil seal area for gear oil leakage. Check differential oil level.
  • Every 40,000-50,000 km: Replace differential oil. Inspect pinion seal condition.
  • Whenever the pinion flange is removed: Always replace the oil seal with a new unit.
  • When differential noise is detected: Inspect oil seal and oil level immediately. Replace if any leakage is found.

Company Details

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,

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 and 

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 from Quality China Factory
  • Business Type:

    Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller

  • Year Established:

    2005

  • Total Annual:

    8000000-10000000

  • Employee Number:

    100~150

  • Ecer Certification:

    Verified Supplier

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 ... 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 ...

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Get in touch with us

  • Reach Us
  • Yimi (Guangzhou) Automotive Parts Co, Ltd
  • Unit 1313, Building 5, Changsheng DDP Fashion Center, No. 17 Dachi Road, Tancun, Shijing Subdistrict, Baiyun District, Guangzhou City.
  • https://www.isuzucarsparts.com/

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