What tool is specifically used to check input shaft endplay?

The tool specifically used to check input shaft endplay is a dial indicator and stand. This instrument allows for precise measurement of the movement or play of the input shaft along its axis. To measure endplay, the dial indicator is mounted in such a way that it can detect the slight axial movement of the shaft when force is applied. This measurement is crucial for ensuring that the input shaft has the correct amount of endplay, which is essential for the proper functioning of a manual transmission.

In contrast, while a torque wrench is important for measuring the amount of torque being applied to fasteners, it does not provide measurements related to endplay. A feeler gauge, typically used to measure gaps or clearances between parts, is not suitable for detecting axial movement. Measuring tape, while useful for measuring larger distances, lacks the precision necessary for checking the minimal endplay of a shaft. Therefore, the dial indicator and stand is the most effective and accurate tool for this specific purpose.