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Allison Transmission will deliver upgraded and new X1100 cross-drive transmissions throughout 2024 to the U.S. Army.

Allison Transmission Awarded $83M Tank Contract

Jan. 24, 2024
The 2024 assignment calls for the propulsion system developer to supply new and upgraded transmissions for Abrams battle tanks, for the U.S. Army and foreign customers.

Indianapolis-based Allison Transmission has drawn an $83.3-million contract to supply upgraded and new X1100 transmissions for different variants of the Abrams Main Battle Tank, used by the U.S. Army and some foreign defense forces.

The M1, M1A1, and M1A2 Abrams tanks are produced by General Dynamics Land Systems. Allison Transmission is the world’s largest manufacturer of medium- and heavy-duty fully automatic transmissions for commercial and defense vehicles. Its X1100 Series™ transmissions are designed for heavy-tracked combat vehicles up to (63,503 kg / 140,000 lbs.) and operate with either a diesel or turbine engine up to 1,120 kW (1,500 hp). The transmission has four forward ranges, two reverse ranges, and a cross-drive design that integrates steering and braking into one compact rugged unit.

The transmission controls are fully electronic, and it features a torque converter with an automatic lock-up clutch for smooth starts and stops, plus full-power hydrostatic steering.

Allison upgraded transmissions combine new content with existing customer hardware to provide a zero-mileage transmission that supports the Abrams System Enhancement Package version 3 tanks.

Deliveries under this contract begin this month and will continue through December 2024.

“Allison is proud to be part of the world’s premier main battle tank supporting the U.S. Army and our close partners. We look forward to continued support of these customers in the decades to come,” stated Dana Pittard,  Allison Transmission vice president for Defense Programs.

Allison will deliver upgraded and new transmissions to meet performance demands of the Abrams tank.

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Hasan Hüseyin Yücel
U.S. Dept. of Defense
General Motors