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Eaton 10004215 Upper Countershaft Cover | Endurant HD OEM
Eaton 10004215 Upper Countershaft Cover (original Non-Hard Lock design) for Endurant HD transmissions built before November 18, 2022. Direct OEM replacement for EEO-17F112C & EEO-18F112C (SN < Z0278934). Included in the K-4491 kit. Pairs with 10004216 housing. Global shipping & lifetime warranty. Get your quote today!
Product Details
Eaton 10004215 Upper Countershaft Cover – Endurant HD OEM (Non-Hard Lock Design)
Factory-direct OEM replacement part for Eaton Cummins Endurant HD automated transmissions built before November 18, 2022. The 10004215 is the original Non-Hard Lock Upper Countershaft Cover, designed for reliable countershaft support and sealing in high-mileage heavy-duty applications. This is the correct service part for older Endurant HD units (Serial Number < ~Z0278934).
Why Choose the Eaton 10004215 Upper Countershaft Cover?
- Original OEM Non-Hard Lock design – exact factory specification
- Integrated fluid channels for proven lubrication
- High-strength die-cast aluminum construction (5 lbs / 2.27 kg)
- Perfect fit for pre-2022 Endurant HD transmissions
- Direct replacement – installs in under 90 minutes via the side cover
- 28 years of OEM-level manufacturing experience at Volgen Power
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 10004215 |
| Design | Non-Hard Lock Upper Countershaft Cover (original) |
| 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 | K-4491 Clutch Housing Front Cover Kit |
| Compatible Inertia Brake Housing | 10004216 |
Vehicle & Transmission Compatibility
Designed exclusively for Eaton Endurant HD Series (pre-2022 builds):
| Transmission Models | Application Notes |
|---|---|
| EEO-17F112C / EEO-17F112C-XD | 17-speed Endurant HD (SN < Z0278934) |
| EEO-18F112C | 18-speed Endurant HD (SN < Z0278934) |
Popular Applications: Freightliner Cascadia, Peterbilt 579/567, Kenworth T680, International LT – paired with Cummins X15 engines (pre-2022 production).
Important Compatibility Note: This 10004215 is the original Non-Hard Lock version. It pairs with the older 10004216 Inertia Brake Housing. For transmissions built on or after November 18, 2022 (SN ≥ Z0278934), or to upgrade older units for improved bearing stability, use the new Hard Lock version A-10004580 + K-4652 Countershaft Bearing Kit.
Installation Highlights
Side-cover access only – no full disassembly required. Always replace the two countershaft cover seals (P/N 10001048) and countershaft bearing O-rings (P/N 10004217) during installation. Torque cap screws to the manufacturer’s specification. Total service time: approximately 90 minutes. Install as part of the K-4491 kit for best results.
Why Buy from Volgen Power?
- 100% genuine OEM specification – CNC machined 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 & upgrade guidance to Hard Lock design
Frequently Asked Questions
What is the difference between Eaton 10004215 and A-10004580?
10004215 is the original Non-Hard Lock Upper Countershaft Cover for transmissions built before November 18, 2022. A-10004580 is the updated Hard Lock Bearing Design version with improved axial stability. Upgrade requires the K-4652 Countershaft Bearing Kit.
Is 10004215 compatible with newer Endurant HD transmissions?
No – newer units (SN ≥ Z0278934) require the Hard Lock version A-10004580.
Which inertia brake housing does it pair with?
It pairs with the older Non-Hard Lock housing 10004216. For Hard Lock upgrade, use A-10004579.
Do you offer the complete K-4491 kit?
Yes – this 10004215 Upper Countershaft Cover is included in the K-4491 Clutch Housing Front Cover Kit, along with the 10004216 housing and all necessary seals & O-rings.
What is your warranty on this part?
Lifetime warranty against manufacturing defects when installed correctly.
Need the Hard Lock upgrade instead?
VIEW A-10004580 HARD LOCK VERSION →
Volgen Power – Shiyan, China • 28 Years • OEM Quality • Global Delivery
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