| M8 high-speed tractor | |
| Type: | Artillery tractor |
| Used By: | US Army, JGSDF |
| Manufacturer: | Allis-Chalmers |
| Production Date: | 1950 to 1955 |
| Is Vehicle: | yes |
| Length: | 22 ft (6.731 m) |
| Width: | 10 ft 11 in (3.327 m) |
| Height: | 10 ft (3.048 m) |
| Speed: | 40 mph (64 km/h) |
| Vehicle Range: | 180 miles (290 km) |
| Primary Armament: | 1 x 0.5 inch (12.7 mm) anti-aircraft machine gun |
| Armour: | none |
| Engine: | Continental AOS-895-3 six-cylinder air-cooled petrol engine |
| Engine Power: | 863 hp (644 kW) |
| Pw Ratio: | 34.60 hp/tonnes |
| Crew: | 1 + 1 |
The M8 high-speed tractor was an artillery tractor used by the US Army and Marine Corps from 1950.
The M8 is a full-track tractor based on the chassis of the M41 Walker Bulldog light tank. It was used to tow cargo trailers and artillery such as the Skysweeper 75 mm anti-aircraft gun and the M59 Long Tom gun. The basic M8 variant could be quickly adapted for carrying projectiles and charges. Unusually for a tractor, the M8's engine was located at the front of the cab. Some M8s were equipped with a hydraulic M5 dozer blade.
The M8 was developed following the failure of the T33 cargo-carrier, which was based on the M24 Chaffee light tank chassis. The new, standardized M8 was produced between 1950 and 1955.