Eaton Fuller and Endurant transmissions: the Eaton Cummins automated range

Endurant is the family of automated manual transmissions built by Eaton Cummins Automated Transmission Technologies, a 50/50 joint venture between Eaton and Cummins Inc. formed in 2017. The family has 12-speed and 11-speed models in its HD series and 18-speed models in its XD series, for engines of up to 2,050 lb-ft, and is offered by the North American truck makers International, Freightliner, Western Star, Peterbilt and Kenworth, and in the XD series by Kenworth in Mexico and Latin America. Fuller is an Eaton gearbox name: in October 2019 the joint venture’s general manager counted the Fuller Advantage automated among “our previous transmissions”, in June 2022 the joint venture listed the Fuller Advantage series and the UltraShift PLUS series in its portfolio beside the Endurant, and Eaton Fuller manual gearboxes appear in the gearbox lists of North American trucks.

Status as of 9 November 2026. Read on that day: Eaton Cummins’ product pages for the Endurant HD, HD N, HD V, XD and XD Pro; its company overview, integrated powertrains and How to Buy pages; and ten of its news releases, from 29 October 2019 to 20 August 2025. None of these pages gives specifications for the Fuller manual gearboxes, and none names a sales market outside North America, Mexico and Latin America.

The joint venture and the Endurant family

The joint venture’s overview reads: “Formed in 2017, Eaton Cummins Automated Transmission Technologies is a 50/50 joint venture between Eaton (NYSE: ETN) and Cummins Inc. (NYSE: CMI).” It describes its mission as “Providing automated transmissions for integration with targeted commercial vehicle engines globally”. The HD V and XD releases call the Endurant an automated manual transmission, a gearbox type set out in truck gearbox types; how such a gearbox shifts is covered in automated manual transmissions.

The release of 29 October 2019 stated that “Over 80,000 units have been sold since launching in late 2017”. On 20 August 2025 the joint venture announced the production of the 500,000th Endurant. It was delivered to the fleet Werner, which the release calls “one of the first fleets to adopt the Endurant transmission following its debut in 2017”, in a new Kenworth T680 that rolled off the line at the Kenworth plant in Chillicothe, Ohio. The same release names among the family’s variants “the Endurant HD, Endurant HD V, Endurant HD N, Endurant XD, Endurant XD Pro and Endurant XD N”. The XD N has no product page among those read, and the release gives no figures for it.

The HD and HD V product pages end their lists of typical vehicle types with the note: “Application approval rules and details provided through the truck manufacturer and Eaton Cummins.” The release of 29 October 2019 stated that, effective January 2020, “Pickup & Delivery, certain Construction, Refuse, and Agriculture applications are approved with Endurant” in its 12-speed overdrive form.

Endurant HD: 12-speed overdrive and 11-speed direct drive

The HD product page describes a gearbox “Engineered with a twin-countershaft design”, with an all-aluminium housing, a diaphragm spring clutch, a transmission fluid pressure sensor and a “cooler-less design”. It is 37.9 in (963.7 mm) long. The overdrive model has 12 forward speeds and an overall ratio of 18.85:1; the direct-drive model has the same first eleven ratios, ending at 1.00 in eleventh gear, and an overall ratio of 14.43:1. Each step between gears is 30 or 31 percent. The page gives a lubrication interval of up to 750,000 miles (1,207,008 km) and an oil capacity of 16 pints (7.57 litres).

A standard 8-bolt power take-off opening is fitted; the 12-speed overdrive models can also have a 4-bolt opening, and the page states: “Standard bottom mount and optional rear PTO mounts are available on Endurant HD 12-speed models”. The PTO turns at 137 percent of engine speed, with a combined PTO torque of 385 lb-ft (522 Nm); the drives themselves are described in power take-off explained. The release of 27 October 2020 added that “maximum horsepower is 510 HP (375 KW)”; the current product page gives no horsepower figure for the HD.

The standard warranty on the HD page is 5 years or 750,000 miles for the transmission in linehaul and pickup-and-delivery applications and 3 years or 300,000 miles in construction, refuse and agriculture; for the clutch it is 3 years or 350,000 miles and 2 years or 200,000 miles respectively.

Endurant HD N and HD V

The HD N is, in its product page’s words, “Based on the Endurant HD automated transmission” and “optimized to integrate with Cummins natural gas engines”. It has new software functions and calibrations and a new diaphragm spring clutch from Eaton “designed to meet the thrust bearing load requirements of natural gas engines”. Its gear ratios, weight and 110,000 lb rating are those of the HD overdrive; it has an 8-bolt PTO opening and no 4-bolt opening. Natural gas trucks and their fuels are covered in LNG and bio-LNG trucks.

The HD V was introduced on 24 October 2024 for vocational trucks. Its product page opens: “For vocational fleets currently running Fuller Advantage automated transmissions or that don’t need all the capability of the Endurant XD series”. It has the HD’s 12 forward ratios, two reverse gears, an Extreme Duty clutch, the Rock Free function “to help get unstuck in mud or sand”, an Off-highway Performance Goal and a Secondary Configuration mode that lets the driver “toggle between two Performance Goals”. The 8-bolt bottom and 4-bolt rear PTO openings are standard, “with a combined 95 horsepower capacity”. The page gives a lubrication interval of 250,000 miles (402,336 km) and lists among typical vehicle types dump trucks, transit mixers, logging trucks, mobile cranes and refuse roll-off trucks. Its warranty table adds a severe-duty class, for logging, mining, oil field, refuse, agriculture and off-highway work, of “2 year / Unlimited”.

Endurant XD and XD Pro: 18 speeds

Eaton Cummins introduced the Endurant XD series on 18 March 2020 for “on-highway applications with high gross combined weight ratings, such as double and triple trailer trucks, and severe-duty on/off-highway applications like dump and logging trucks”. That release stated that the series “has torque and horsepower capacity to cover all Class 8 North American engines, including the Cummins X15”. The release of 20 January 2022 gave its specifications and stated: “Production of the Endurant XD series begins in Q3 2022.”

Both versions have 18 forward speeds in a ratio set the maker calls 18D, running from 14.32 to 0.70 in steps of 19 or 20 percent, with an overall ratio of 20.46; the text of the product pages rounds this to 20.5:1. The XD is rated for engines of 1,650 to 1,850 lb-ft and for on-highway use up to 166,000 lb GCWR. The XD Pro is rated for engines of 1,650 to 2,050 lb-ft, has an unlimited GCWR, “can be configured with up to 6 reverse gears” and uses Eaton’s Extreme Duty clutches. Within the XD series, the XD Pro product page and the release of 20 January 2022 name Rock Free and the Off-highway Performance Goal as “Unique software features to the Endurant XD Pro”. The terms GCW and GCWR are set out in GVWR, GCWR and GAWR explained.

The XD series drives its power take-offs from the input shaft. An 8-bolt bottom and a 4-bolt rear mount operate “at 111% of engine speed” regardless of the gear engaged, “with a total combined PTO capacity of 160 horsepower or 610 lb.-ft. of torque”. The lubrication interval is 500,000 miles or 5 years on-highway, 250,000 miles or 3 years in vocational use and 2,500 hours or 3 years in stationary use; the oil capacity is 25.4 pints (12 litres) for a configuration without cooler and PTO. In the January 2022 release, “Trucks operating below 110,000 pounds don’t require a transmission cooler”.

How a gearbox ratio combines with the axle ratio into the overall reduction at the wheels is set out in axle ratios and final drive.

Software functions

The product pages describe Performance Goals as functions “which combine transmission shift points and clutch calibrations with unique software”, and group further functions under the name GearLogic. Among them are Hill Start Aid, in which “the foundation brakes hold the truck for a controlled launch” when the grade exceeds a programmed threshold; Urge to Move, with which drivers “release the brake pedal to automatically inch forward”; Creep Mode, at engine idle with a locked clutch; Neutral Coast, which “disengages the driveline on slight downhill grades”; Enhanced Engine Braking, which “Downshifts the transmission to help slow the truck on long, steep descents”; and Predictive Shifting, which “Uses look-ahead technology to execute shift decisions”.

Engines and trucks

The integrated powertrains page names the Cummins X15 and X12 as engines paired with the Endurant. The X15 ratings that require the Endurant are described in Cummins X15 engine. For PACCAR the page states: “The PACCAR MX-13 engine and PACCAR automated transmission share critical data, including engine torque and operating gear”; the engine is described in PACCAR MX-13 engine.

The HD V release of 24 October 2024 names “9-liter, 11-liter, and the upcoming Cummins X10 engines” for that model. The How to Buy page lists five truck makers in which Eaton Cummins transmissions can be specified: International, Freightliner, Western Star Trucks, Peterbilt and Kenworth.

Fuller Advantage, UltraShift PLUS and Eaton Fuller manual gearboxes

The joint venture’s release of 9 June 2022 listed its portfolio as the Endurant XD and Endurant XD Pro, the Endurant HD, the “Fuller Advantage® series” and the “UltraShift® PLUS series (MXP, VXP, MHP, VMS, VCS)”. Other Eaton Cummins texts compare the Endurant with both. In October 2019 the joint venture’s general manager spoke of “nearly 200-pound weight savings that Endurant provides over our previous transmissions, such as the Fuller Advantage automated”. For the XD series the product pages state that “It’s even 225 pounds lighter than comparable UltraShift® PLUS models” and that its Precision Lubrication system gives “up to 2 percent better fuel economy than UltraShift® PLUS”; the XD product page also compares its shifts with “previous 13- and 18-speed automated transmissions”.

Eaton gearboxes appear in the gearbox lists that truck makers publish, as recorded on the model pages: Eaton Fuller manual gearboxes on the Freightliner M2, Western Star 49X, International LT, International MV Series and Mack Granite; Eaton FR and RT manual gearboxes on the Peterbilt 579 and FR, FS and RT on the Peterbilt 537 and 548; UltraShift or Fuller Advantage automated gearboxes on the Freightliner M2, Peterbilt 579, Peterbilt 537 and 548, International LT and International MV Series; and Eaton gearboxes on the Kenworth T680 in Mexico, the Ford Trucks F-Line and the SHACMAN X6000.

Where the sources differ

• The release of 18 March 2020 stated that “Endurant XD transmissions will be available starting in 2021”; the release of 20 January 2022 gave the start of production as the third quarter of 2022.
• The HD V release of 24 October 2024 gave a maximum gross combination weight of 70,000 pounds (32,000 kg) and a maximum engine torque of 1,700 lb-ft (2,300 Nm); the current HD V product page gives 110,000 pounds (50,000 kg) and up to 1,850 lb-ft (2,500 Nm).
• For the same torque steps the HD V page gives 2,000, 2,200 and 2,500 Nm, while the HD and HD N pages give 1,966, 2,237 and 2,508 Nm.
• The release of 27 October 2020 named the Volvo VNL among the trucks with the Endurant HD; the How to Buy page does not list Volvo.