Ground Warfare

Allison Transmission Inc Awarded U.S. Army Contract for New X-1100-3B Abrams Tank Transmissions


Allison Transmission Inc., Indianapolis, Indiana, was awarded a $68,557,517 cost-plus-fixed-fee, firm-fixed-price contract for new X1100 Abrams transmissions, transmission upgrades, transmission sustainment kits and service support. Bids were solicited via the internet with one received. Work locations and funding will be determined with each order, with an estimated completion date of March 23, 2023. Fiscal 2020 procurement of weapons and tracked combat vehicles, Army funds in the amount of $68,557,517 were obligated at the time of the award. U.S. Army Contracting Command, Detroit Arsenal, Michigan, is the contracting activity.

The M1 Abrams has an Allison DDA X-1100-3B four-speed automatic transmission. Allison Transmission’s X1100 Series is designed for heavy-tracked combat vehicles up to 45,359-63,503 kg (100,000-140,000 lbs.) and can accept either diesel or turbine engines with ratings up to 1,120 kW (1,500 hp). The X1100 is equipped with four forward ranges, two reverse ranges and a cross-drive design that integrates steering and braking into one compact rugged unit. With fully electronic controls for use with modern engines, a torque converter with an automatic lock-up clutch for smooth and efficient starts and stops, and full-power hydrostatic steering, the X1100 provides unrivaled reliability and durability.

Allison Transmission is an American manufacturer of commercial duty automatic transmissions and hybrid propulsion systems. Allison products are specified by over 250 vehicle manufacturers and are used in many market sectors including bus, refuse, fire, construction, distribution, military, and specialty applications. With headquarters in Indianapolis, Indiana, Allison Transmission has regional offices all over the world and manufacturing facilities in Indianapolis, Chennai, India, and Szentgotthárd, Hungary.

Allison Transmission Inc Awarded U.S. Army Contract for New X-1100-3B Abrams Tank Transmissions
A group of U.S. Army 2LTs, assigned to Class 19-008 in Armor Basic Officer Leadership Course, 2nd Squadron, 16th Calvary Regiment, conducts an offensive movement forward toward the objective during a maneuver exercise in their M1A2 Abrams Tank at Good Hope Maneuver Training Area, Fort Benning, Ga., Jan. 29, 2020. (U.S. Army Reserve photo by Staff Sgt. Austin Berner)
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