Schmidt, J. and Hadley, G., "The New X1100 Automatic Transmissions for the XM1 Tank," SAE Technical Paper 770339, 1977, doi:10.4271/770339.
The X1100 is a fully automatic shifting transmission which has been designed and developed for vehicles in the 49 to 60 ton class, operating at speeds of 40 to 50 mph. A modular design is utilized to provide application flexibility for diesel or turbine engines of 1300 to 1500 GHP, as well as adaption to the current M60 vehicle. This automatic transmission features a hydrostatic steer system with pivot steer, a four speed range pack, integral power brakes and a high speed reverse. The torque converter can be locked up in all gear ranges to provide optimum transmission performance.