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The U.S. Army and Marine Corps M1A2 Abrams main battle tanks will be equipped with new gearboxes. Since 2017, the U.S. Army and U.S. Marine Corps have released the latest version of the main battle tank, which was introduced in 1980, with the third system enhancement package (SEP v3). With the SEP, manageability, sustainability and effectiveness have been improved and the basis for digitalization expanded.

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X1100 gearbox for M1A2 Abrams (Photo: Allison Transmission)

Allison Transmission has now been commissioned to supply the latest version of the X1100-3B1 transmission. The order, worth around 150 million euros, includes gearbox manufacture, modernization, kits for extending the service life and support in operation. Deliveries started in March 2020 and will continue until December 2021.

The X1100 hydromechanical manual, reversing and steering gearbox is designed for heavy combat vehicles weighing 50 to over 70 tons. Allison has been supplying X1100 gearboxes for the Abrams tanks since 1979. This new contract supports the Army's efforts to convert the Abrams tanks to the M1A2 SEP v3 configuration.

Gerhard Heiming