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Eaton A-10004580 Upper Countershaft Cover | Endurant HD Hard Lock OEM
Eaton EAHDA-10004580 Upper Countershaft Cover (Hard Lock Bearing Design) for Endurant HD transmissions. Direct factory replacement for EEO-17F112C & EEO-18F112C. Die-cast aluminum, integrated oil channels, 5 lbs. Global shipping & lifetime warranty. Get your quote today!
Product Details
Eaton A-10004580 Upper Countershaft Cover – Endurant HD Hard Lock Bearing Design
Factory-direct OEM replacement part engineered for Eaton Cummins Endurant HD automated transmissions. The A-10004580 (also referenced as EAHDA-10004580) is the official Hard Lock Upper Countershaft Cover designed to eliminate axial bearing movement, reduce vibration, and improve sealing performance in high-mileage heavy-duty applications.
Why Choose the Eaton A-10004580 Hard Lock Cover?
- Hard Lock Bearing Design – prevents countershaft walk and premature failure
- Integrated fluid channels for superior lubrication
- High-strength die-cast aluminum construction (5 lbs / 2.27 kg)
- Perfect fit for 2022+ Endurant HD transmissions (SN ≥ Z0278934)
- Direct replacement – installs in under 1.5 hours via side cover access
- 28 years of OEM-level manufacturing experience at Volgen Power
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | EAHDA-10004580 |
| Design | Hard Lock Bearing Design |
| Material | High-strength die-cast aluminum with integrated oil channels |
| Weight | 5 lbs (2.27 kg) |
| Cap Screws Required | 10 × M8×1.25×25 (P/N 10001814-MP10) |
| Included in Kit | EAHDK-4654 Clutch Housing Front Cover Kit |
| Compatible Bearing Upgrade | K-4652 Countershaft Bearing Kit |
Vehicle & Transmission Compatibility
Designed exclusively for Eaton Endurant HD Series:
| Transmission Models | Application Notes |
|---|---|
| EEO-17F112C / EEO-17F112C-XD | 17-speed Endurant HD |
| EEO-18F112C | 18-speed Endurant HD |
Popular Applications: Freightliner Cascadia, Peterbilt 579/567, Kenworth T680, International LT – paired with Cummins X15 engines.
Important Compatibility Note: This A-10004580 Hard Lock cover CANNOT be installed on transmissions built before November 18, 2022 (Serial Number ~ Z0278934) without simultaneously installing the K-4652 Hard Lock Countershaft Bearing Kit.
Installation Highlights
Side-cover access only – no full disassembly required. Torque cap screws to the manufacturer’s specification. Always replace the two countershaft cover seals (P/N 10001048) during installation. Total service time: approximately 90 minutes.
Why Buy from Volgen Power?
- 100% OEM specification – CNC machined, stress-relieved, and pressure-tested
- Factory direct pricing – up to 40% lower than dealerships
- Lifetime warranty on all transmission components
- Fast global shipping from China + USA warehouse stock
- Trusted by fleets in 70+ countries since 1996
- Full technical support & installation guides
Frequently Asked Questions
Is the Eaton A-10004580 compatible with older Endurant transmissions?
No – it requires the K-4652 Hard Lock Bearing Kit on units built before November 18, 2022 (SN ~ Z0278934).
What is the difference between A-10004580 and the older 10004215 cover?
The A-10004580 features the new Hard Lock Bearing Design for improved axial stability and reduced vibration.
Do you offer the complete EAHDK-4654 kit?
Yes – contact us for the full Clutch Housing Front Cover Kit, including the A-10004580 cover, seals, and inertia brake housing.
What is your warranty on this part?
Lifetime warranty against manufacturing defects when installed correctly.
Ready to upgrade your Endurant HD transmission?
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