Abstract: A pinion disassembly tool is configured to remove a yoke or a flange member and a pinion fastener from a splined pinion shaft in a pinion assembly. The tool includes a yoke holding plate with a central aperture sized to receive a socket wrench during removal of the pinion fastener. The yoke holding plate includes fastener apertures for connection to the yoke and at least one non-circular aperture for receiving a breaker bar during removal of the pinion fastener. The tool also includes a drive plate with a threaded aperture, the drive plate inserted through the central aperture of the yoke holding plate after removal of the pinion fastener. The tool also includes a drive bolt engaged with the threaded aperture and configured to force the drive plate and the yoke holding plate to pull the yoke from the splined pinion shaft as the drive bolt is rotated.

Abstract: A measurement tool for determining a position of a pinion gear in a differential assembly includes a mounting member configured to contact an end face of the pinion gear and an elongated arm member extending outwardly from the mounting member. The arm member has an arm portion configured to overlie one of the bearing seats of the differential assembly and an aperture formed in the arm member configured to receive a measurement gage therethrough. The measurement gage is used to measure a distance between a surface of the bearing seat and a reference surface of the arm member from which the position or “pinion depth” of pinion gear can be determined.