Oshkosh Heavy Expanded Mobility Tactical Truck
Series: Other models
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The Oshkosh Heavy Expanded Mobility Tactical Truck is a special-purpose vehicle made by Oshkosh. Engine output is 515 kW. Detroit Diesel o mocy 445 KM (332 kW) lub 450 KM (336 kW) acted as the engine supplier.
Gearbox: Allison 4500SP 5-speed automatic with Oshkosh enhanced 55000 lb kg adj=on 2 speed transfer case.
The fuel specified is 155 gal L 0. Within the range, rated power spans from 31 to 600 kW; with 515 kW, the Heavy Expanded Mobility Tactical Truck sits in the mid-field. Directly alongside are the M911 with 435 kW below and the PLS with 600 kW above.
Oshkosh M911: heavy tractor unit with a two-stroke Detroit Diesel 8V92TA V8 engine, 324.4 kW output, 26,000 kg gross vehicle weight and a 6,750 mm wheelbase
Oshkosh is a US manufacturer from Wisconsin, specialising in heavy and off-road specialist trucks. The M911 belongs to the company's heavy tractor vehicles.
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The M911 is powered by an eight-cylinder two-stroke Detroit Diesel 8V92TA diesel engine rated at 324.4 kW. With a gross vehicle weight of 26,000 kg and a kerb weight of 16,550 kg, around 9,450 kg remains for payload or towed load. A length of 9,370 mm, a wheelbase of 6,750 mm and eight wheels across multiple axles point to a vehicle built for heavy towing duty.
At a gross weight of 26,000 kg, the M911 belongs to EU class N3, the heavy commercial vehicles above 12 tonnes. The Detroit Diesel 8V92TA is a two-stroke engine, a design that differs from today's common four-stroke diesels and was known for high output per litre in a compact size.
When buying an M911, the condition of the two-stroke diesel engine matters particularly, since its servicing – oil consumption and cylinder liner lubrication, for instance – differs from four-stroke engines. The frame, axles and towing gear should be carefully checked for wear and cracks given the high loads involved in towing. The air suspension and braking system also deserve a thorough check at this weight, as do the seals on the numerous axles and the condition of the coupling used for towed loads.
Sources: SpecCodex-Register: Kennwerte des Modells Oshkosh M911
Technical data
Engine
| Engine | Detroit Diesel o mocy 445 KM (332 kW) lub 450 KM (336 kW)correct |
|---|---|
| Fuel | 155 gal L 0correct |
| Power | 378.8 kWcorrect |
Drivetrain and chassis
| Gearbox | Allison 4500SP 5-speed automatic gearbox with Oshkosh enhanced 55000 lb kg adj=on 2 speed transfer casecorrect |
|---|
Frequently asked questions
How much power does the Oshkosh Heavy Expanded Mobility Tactical Truck have?
The Oshkosh Heavy Expanded Mobility Tactical Truck delivers 379 kW.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 4 individual figures for this model. They come from 2 recorded sources; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Sources: Wikipedia (CC BY-SA 4.0) (retrieved August 2026) · Values adopted and presented in our own form; changes from the source are possible. · How we check the data
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