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To serve the increasing demand of the automotive industry for transient systems evaluation, the Powertrain Control Research Laboratory (PCRL) has developed a transient test facility which uses high-bandwidth hydraulic dynamometers for hardware-in-the-loop powertrain simulation and testing. Following building renovation in 2006, the research team assumed the task of reconfiguring the dynamometer laboratory into a state-of-the-art testing facility. This includes the relocation and design of support facilities for both single- and multi-cylinder engine transient test systems. This paper introduces the applications of transient testing facilities and describes the unique challenges faced by the research team to achieve a versatile powertrain research environment with emphasis on accessibility and optimal space utilization, maintainability, and comprehensive documentation to aid future research endeavors.