The present disclosure relates to an improved and efficient freeplay (also interchangeably referred to as free play�) diagnostic device for measuring and/or monitoring, but without limitation, the positional or rotational variation in mechanical parts. In an aspect, said device can include a holding jaw and a computing device. The holding jaw can have a first end and the second end. The first end can be mechanically coupled to the mechanical component that has ability to rotate. The second end can pass through a torque sensor and can be mechanically coupled to a rotary encoder shaft. The computing device can be communicably coupled to the torque sensor and/or the encoder, for computing and displaying the measured and/or monitored freeplay in the mechanical component based on the torque and the angular position.
