 | A request that this article title be changed to M40 gun motor carriage is under discussion. Please do not move this article until the discussion is closed. |
| 155 mm gun motor carriage M40 | |
|---|---|
 M40 in the US Army Ordnance Museum | |
| Type | Self-propelled artillery |
| Place of origin | United States |
| Production history | |
| No. built | 311 |
| Specifications | |
| Mass | 36.3 metric tons (80,000 lb) |
| Length | 9.1 m (29 ft 10 in) |
| Width | 3.15 m (10 ft 4 in) |
| Height | 2.7 m (8 ft 10 in) |
| Crew | 8 (Commander, driver, 6 gun crew) |
| Armor | 12 mm |
Main armament | 155 mm M2 gun 20 rounds |
| Engine | Wright (Continental) R975 EC2 340 hp (253 kW) |
| Power/weight | 9.36 hp/t |
| Suspension | HVSS (Horizontal Volute Spring Suspension) |
Operational range | 170 km (106 mi) |
| Maximum speed | 38 km/h (24 mph) on road 23 km/h (14 mph) off-road |
The 155 mm gun motor carriage M40 was an American self-propelled artillery vehicle built on a widened and lengthened medium tank M4A3 chassis, but with a Continental engine and with HVSS (horizontal volute spring suspension), which was introduced at the end of the Second World War.