The original X1100 transmission was developed by Allison Transmission in the 1970s and went into production in 1979 as the X1100-3B. This configuration was for application with the Textron Lycoming AGT-1500 gas turbine, as installed in the General Dynamics Land Systems M1/M1A1 and M1A2 Abrams MBTs.

The X1100 centre section was designed so that it could be adapted for other engines such as gas turbines, rotary or diesel of comparable power ratings. This is done by using different input modules that are compatible with the particular engine and vehicle installation requirements. The X1100-5 was developed for application with the General Dynamics Land Systems AVDS-1790 diesel engine. Concepts for the following vehicle applications have been made: M48A5, M60, AVLB (M60/M48 chassis), M728 CEV, M88 and Challenger. The M88 and Challenger require an input gearbox. Currently, an M60 AVLB demonstrator is running.

As the US Army has now placed a low rate initial production order for the M1 Wolverine Heavy Assault Bridge (HAB) it is considered improbable that the US Army will order the enhanced M60 AVLB which is known as the Razorback.