Eaton Cummins Endurant Transmission
Specs, gear ratios, oil change interval and warranty
Eaton Cummins
The Eaton Cummins Endurant is a family of automated manual transmissions: the 12-speed HD (and an 11-speed direct drive), the 18-speed XD and the 18-speed XD Pro. Torque ratings run from 1,650 to 2,050 lb-ft. Eaton Cummins lists an oil change at up to 750,000 miles for the HD, and 500,000 miles or 5 years on the highway for the XD and XD Pro. It recommends Eaton PS-386 oil in all three.
Eaton Cummins published the Eaton Cummins Endurant figures in its own documents. Last reviewed November 3, 2026.
What are the Eaton Cummins Endurant specs?
| Type | Automated manual (AMT) |
|---|---|
| Oil | Eaton PS-386 (HD, XD and XD Pro) |
| Oil capacity | 16 pints (7.57 L) for the HD; 25.4 pints (12 L) for the XD and XD Pro (coolerless, no PTO) |
| Overall ratio | 18.85:1 (HD overdrive); 14.43:1 (HD direct drive); 20.46 (XD and XD Pro) |
| Maximum horsepower | 605 hp (XD and XD Pro) |
| PTO | HD: 8-bolt, plus 4-bolt on 12-speed overdrive, 385 lb-ft combined. XD and XD Pro: 4-bolt and 8-bolt, 160 hp and 610 lb-ft combined. |
| Clutch | HD: maintenance-free diaphragm spring clutch. XD: standard self-adjust. XD Pro: extreme duty (the 2,050 lb-ft version is labeled high torque). |
Compare the Eaton Cummins Endurant with the others in the transmission specs reference, and see which truck it sits in on the truck model specs.
What should you check before you spec or buy a truck with the Eaton Cummins Endurant?
- Find out which Endurant it is: HD, XD or XD Pro. Torque ratings run from 1,650 to 2,050 lb-ft, and the oil capacity differs between the HD and the XD.
- Check the service record for Eaton PS-386 oil and the interval for the job. Eaton Cummins lists up to 750,000 miles for the HD, 500,000 miles or 5 years for the XD and XD Pro on the highway, and 250,000 miles or 3 years for vocational.
- Get the warranty in writing. Eaton Cummins lists HD terms by job, and the pages we read do not state a warranty for the XD and XD Pro.
What is the difference between the Endurant HD, XD and XD Pro?
All three come from Eaton Cummins. The pages give ratings for each model, shown here as listed.
| Model | Speeds | Max engine torque | Max GCW | Weight |
|---|---|---|---|---|
| HD overdrive | 12 forward, 1 or 2 reverse | 1,850 lb-ft | 110,000 lb | 657 lb (660 lb with dual PTO) |
| HD direct drive | 11 forward, 1 or 2 reverse | 1,750 lb-ft | 80,000 lb | 657 lb |
| XD | 18 forward, 3 reverse | 1,650 or 1,850 lb-ft | 166,000 lb | 808 lb |
| XD Pro | 18 forward, 6 reverse | 1,650, 1,850 or 2,050 lb-ft | Unlimited | 813 lb |
What are the Eaton Cummins Endurant gear ratios?
Endurant HD 12-speed (overdrive)
- Gear 114.43
- Gear 211.05
- Gear 38.44
- Gear 46.46
- Gear 54.95
- Gear 63.79
- Gear 72.91
- Gear 82.23
- Gear 91.70
- Gear 101.30
- Gear 111.00
- Gear 120.77
- Reverse 116.92
- Reverse 212.95
The 11-speed direct drive uses the first 11 ratios and the same two reverse ratios.
Endurant XD and XD Pro 18-speed
- Gear 114.32
- Gear 211.96
- Gear 310.02
- Gear 48.43
- Gear 57.04
- Gear 65.90
- Gear 74.95
- Gear 84.13
- Gear 93.46
- Gear 102.89
- Gear 112.41
- Gear 122.02
- Gear 131.70
- Gear 141.42
- Gear 151.19
- Gear 161.00
- Gear 170.83
- Gear 180.70
- Reverse 115.25
- Reverse 212.73
- Reverse 310.67
- Reverse 43.08 (XD Pro only)
- Reverse 52.57 (XD Pro only)
- Reverse 62.15 (XD Pro only)
The XD lists three reverse gears. The XD Pro lists six.
What fluid does the Eaton Cummins Endurant use, and how often do you change it?
Eaton Cummins recommends the same oil, Eaton PS-386, for the HD, XD and XD Pro.
| Recommended oil | Eaton PS-386 |
|---|---|
| HD oil capacity | 16 pints (7.57 L) |
| XD and XD Pro oil capacity | 25.4 pints (12 L), for coolerless units without a PTO |
| Cooler | The XD and XD Pro pages say no transmission cooler is needed when the combined weight is under 110,000 lb |
Eaton Cummins lists one interval for the HD and three for the XD and XD Pro.
| Duty cycle | Interval |
|---|---|
| Endurant HD (the page gives one interval, not one per duty) | Up to 750,000 miles |
| XD and XD Pro, on-highway | 500,000 miles or 5 years |
| XD and XD Pro, vocational | 250,000 miles or 3 years |
| XD and XD Pro, stationary | 2,500 hours or 3 years |
- Eaton Cummins says the HD clutch needs no maintenance.
- The XD and XD Pro pages say service intervals can reach 500,000 miles, depending on the job.
Put your Eaton Cummins Endurant service on a schedule with the maintenance scheduler. If a warning light comes on, decode it with the fault code lookup.
What warranty does the Eaton Cummins Endurant have?
Warranty, as the maker lists it
- HD transmission, linehaul and pickup and delivery: 5 years or 750,000 miles
- HD transmission, construction, refuse and agriculture: 3 years or 300,000 miles
- HD clutch, linehaul and pickup and delivery: 3 years or 350,000 miles
- HD clutch, construction, refuse and agriculture: 2 years or 200,000 miles
- The HD page also lists extended protection plans for the transmission and the clutch.
- The XD and XD Pro pages we read do not state a warranty.
Which engines and trucks go with the Eaton Cummins Endurant?
Eaton Cummins says the XD Pro can pair with the most powerful engines and names the Cummins X15 series. None of the three pages lists truck models. The HD page says application approval goes through the truck maker and Eaton Cummins.
What Eaton Cummins claims
- Eaton Cummins says the XD gets up to 2% better fuel economy than the UltraShift PLUS and weighs 225 lb less than comparable UltraShift PLUS models. It makes the same claims for the XD Pro. These are the company's claims, not tested figures.
- Eaton Cummins calls the HD a lightweight, highly efficient transmission but gives no percent figure for it.
What is not published about the Eaton Cummins Endurant?
- An HD oil interval for each duty
- A warranty for the XD and XD Pro
- Which truck models offer each version
- A price
There is no public, independent failure-rate data for any heavy-duty transmission, including the Eaton Cummins Endurant. This page does not rank reliability. It lists what the maker publishes: ratings, ratios, fluid, service intervals and warranty. For a used truck, ask for the service records and check the oil and clutch history.
How does the Eaton Cummins Endurant compare with other transmissions?
Each transmission guide on this site follows the same format and the same sourcing rule, so you can read the Eaton Cummins Endurant next to the others. We do not name a winner.
- PACCAR TX-12Automated manual, 12-speed
- Detroit DT12Automated manual, 12-speed
- Allison 4000 SeriesFully automatic, 6- or 7-speed
Side-by-side comparisons with the Eaton Cummins Endurant
The Endurant HD page and PACCAR's TX-12 spec sheet publish the same ratio table, the same 657 lb weight, the same 16 pints of oil and the same 1,850 lb-ft rating. Neither company's pages explain how the two are related, so this site does not say.
Eaton Cummins Endurant frequently asked questions
What oil does an Eaton Endurant transmission use?+
Eaton Cummins recommends Eaton PS-386 for the Endurant HD, XD and XD Pro. The HD holds 16 pints (7.57 L). The XD and XD Pro hold 25.4 pints (12 L) in coolerless units without a PTO.
How often should you change Eaton Endurant oil?+
For the HD, Eaton Cummins lists up to 750,000 miles. For the XD and XD Pro, it lists 500,000 miles or 5 years on the highway, 250,000 miles or 3 years for vocational use, and 2,500 hours or 3 years for stationary use. Use whichever limit comes first.
What is the Eaton Endurant warranty?+
For the HD, Eaton Cummins lists 5 years or 750,000 miles on the transmission and 3 years or 350,000 miles on the clutch for linehaul and pickup and delivery. For construction, refuse and agriculture it lists 3 years or 300,000 miles and 2 years or 200,000 miles. The XD and XD Pro pages do not state a warranty.
What are the Eaton Endurant gear ratios?+
The 12-speed HD runs from 14.43 to 0.77, with an overall ratio of 18.85:1. The 18-speed XD and XD Pro run from 14.32 to 0.70, with an overall ratio of 20.46. The XD has 3 reverse gears and the XD Pro has 6.
How much does an Eaton Endurant weigh?+
Eaton Cummins lists 657 lb for the HD (660 lb with dual PTO), 808 lb for the XD and 813 lb for the XD Pro.
How long does an Eaton Endurant last?+
Eaton Cummins does not publish a life figure for the Endurant. Its published facts are a 5-year, 750,000-mile warranty on the HD for linehaul and oil intervals up to 750,000 miles (HD) or 500,000 miles (XD and XD Pro). No independent failure study exists. On a used truck, ask for the oil change records.
Sources for the Eaton Cummins Endurant
Run a Eaton Cummins Endurant truck? Let a dispatcher handle the rest.
Grow Trucking finds loads, negotiates rates and does the paperwork for owner-operators and small fleets. Tell us about your Eaton Cummins Endurant truck and we will show you how we can help.
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Ratings, intervals and warranty terms for the Eaton Cummins Endurant change by model year and configuration. Confirm the exact figures for a specific truck against Eaton Cummins's current documents and your written warranty before you make a purchase or maintenance decision.
Free tools for a Eaton Cummins Endurant truck
Keep the Eaton Cummins Endurant serviced on time, decode its fault codes and check a truck before you buy.
- Preventive Maintenance SchedulerTrack Eaton Cummins Endurant oil changes by odometer for your duty cycle.
- Diesel Fault Code Lookup (SPN/FMI)Decode the SPN/FMI fault codes the Eaton Cummins Endurant reports.
- Breakdown Cost EstimatorEstimate what a Eaton Cummins Endurant breakdown costs in repairs and lost revenue.
- Used Truck Inspection ChecklistCheck the Eaton Cummins Endurant and clutch before you buy a used truck.