This document discusses the design and simulation of ternary logic shift up and shift down gates using MOSFETs. It begins with background on ternary logic and its advantages over binary. It then describes the design of limiting circuits for the shift up and shift down gates using transistors. The limiting circuits are combined with inverter circuits to realize the full gates. Simulation results on LTSpice are provided showing the gates operate as expected by their truth tables. Potential applications of these new ternary logic gates include developing adders, subtractors, and other circuits, as well as realizing other unknown ternary gate designs.