What is the Eaton Endurant HD?
Eaton Cummins offers Endurant HD in 12-speed overdrive and 11-speed direct-drive versions. It is an automated manual transmission, with the system controlling clutch operation and gear selection. The HD family should be distinguished from the heavier-duty Endurant XD and XD Pro offerings.
What matters in a comparison
For an Endurant HD comparison, ask for the complete model code and the selected direct-drive or overdrive configuration. Evaluate it with axle ratio, tyre size and engine rating. The number of gears alone cannot establish suitability or fuel cost. Describe any PTO work and operating weight to the supplier, and confirm that the application is approved for the actual transmission.
Fluids & filters
Endurant HD North American transmission family; the full model code and installed options govern parts selection.
Reference checked:
Identify the unit first
Use these details to match the manufacturer's application record before choosing a fluid or ordering a filter.
- Complete transmission model code
- Transmission serial number
- Installed oil filter/cooler/PTO arrangement
- Service duty and current lubricant specification
Fluid specifications
Transmission lubricant
Eaton-approved PS-386 synthetic transmission lubricant.
For Endurant HD applications covered by the OEM references; verify the approved-product label.
Source 1 ↗Filter numbers & cross-references
A catalogue cross-reference links part numbers. It does not confirm that either part fits every version of this model. Match the original part to the unit first, then check the replacement manufacturer's application and any supersession.
No application-specific filter number is verified here. Use the official identification and parts references below.
Endurant HD OEM parts catalogue ↗
What still needs unit-specific confirmation
- A routine replacement transmission-oil filter part number was not verified in the public sources checked. Use the Endurant HD service/parts catalogue for the exact model and serial number; do not infer a Fuller filter fitment.
Official service and parts references
Source 1 ↗ Source 2 ↗Follow the current manufacturer's manual for the identified unit. This page does not set a drain interval, fill quantity or repair procedure.
Questions to take to the supplier
- Is this the direct-drive or overdrive version?
- What engine torque and operating weight are approved?
- Does the PTO configuration support the required work?
Sources & limits
Manufacturer material supports the identification and overview above. Comparison considerations and supplier questions are Truck University’s original editorial interpretation, prepared with AI assistance. They are not an independent performance test or expert inspection.
Model-family reference only. Availability, specifications and service requirements can differ by year, market and configuration. Verify the actual vehicle or component using its identification and current manufacturer documentation. Do not use this page as a parts-fitment, modification, repair or loading instruction.
Published specifications and examples retain their labelled units; the header preferences apply to calculators.
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