The 76.2mm Gun Motor Carriage, M18 (abbreviated as M18 GMC) is an American tank destroyer developed during the second world war.
During the summer of 1944, 685 M18s were returned to factories to receive a new gearbox. 640 of them were converted to a transport variant, M39.
The T56 was the first design in the line towards the M18. It was based on the M3A3 Stuart tank. A 37mm gun in an open turret was tested, which was considered obsolete. A Royal Ordnance QF 6 Pounder (57mm) was tested as well in 1942.
The T67 was the 2nd design, it was armed with an unknown 75mm gun. The design was based on the T49 Medium tank chassis. One model was tested in November 1942 in Aberdeen.
The T70 was the latest design. The 75mm was replaced with the 76.2mm M1. The engine was replaced by the Continental R-975-C1. Some problems persisted in the design; the front shock absorber was too weak for the weight of the tank, and the tracks had a below-average track life. After some fixes and a few small changes in the armour layout, the M18 was born. 6 T70 GMCs were completed.
76.2mm Gun Motor Carriage, M18
Standard production model.
Armored Utility Vehicle, M39
Transport version without turret. 640 converted.
| Land Vehicles of the United States of America |
1919 - 1945
|Transport||M2 (A1 • A2 • E6) • M3 (A1 • A2 • E2) • M5 (A1 • A2) • M9 (M9A1)|
T7 • T14 • T16 • T29 • T31
|Trucks||T15 • T16 • T17 • T18 • T19|
|Gun Motor Carriages (GMC)||M3, 75mm (A1) • M34, 40mm|
T12, 75mm • T48, 57mm • T54, 40mm (E1) • T59, 40mm (E1) • T60, 40mm (E1) • T68, 40mm
|Howitzer Motor Carriages (HMC)||T19, 105mm • T30, 75mm • T34, 105mm • T38, 105mm|
|Multiple Gun Motor Carriages (MGMC)||M2 Halftrack (B-6) • M13 • M14 • M15 (A1) • M16 (A1) • M17|
T1 (E1 • E2 • E3 • E4) • T10 (E1) • T28 (E1) • T58
|Mortar Motor Carriages (MMC)||81mm M4 (A1) • T19 • M21 • T21 (E1)|
|Utility||Patton's Command Vehicle • Radio Carrier, T17 • T18 Instrument Carrier|