What is the Eaton Endurant XD?
The Endurant XD is an 18-speed automated manual aimed at heavier on-highway work. Eaton’s transmission guide distinguishes its three reverse ratios from the XD Pro’s six. That distinction is one reason the XD and XD Pro suffixes should remain visible in a truck specification.
What matters in a comparison
When comparing XD with HD or XD Pro, describe gross combination weight, site use and low-speed manoeuvring needs. Obtain the application approval and full model code rather than selecting on gear count alone. Check PTO provisions against the actual equipment. The supplier’s range description does not substitute for a vehicle-specific assessment of a heavy-load combination.
Fluids & filters
Endurant XD 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 XD 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.
Eaton Cummins does not approve external oil filters on Endurant XD Series transmissions. Do not add a Fuller-style external filter to this gearbox.
Source 1 ↗Official service and parts reference ↗
What still needs unit-specific confirmation
- Internal service parts and any strainers require the exact model/serial service catalogue. No external-filter substitute is listed.
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
- What operating weight is approved for this model?
- How much work occurs away from paved roads?
- Which reverse and PTO requirements does the job have?
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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