Jig measuring block and use of the same

Claim 1

A differential jig block to position the parts of a differential in their normal operating position to assist in securing rapid and accurate measurements of said parts and wherein said differential jig measuring block does not measure any of said parts but provides a basic reference dimension, said block comprising: a. a generally annular configuration whose outside diametrical dimension is substantially the same as but slightly less than the interior diametrical dimension of a bearing assembly bore and in which bore said block will be positioned; b. said block having a center line and said center line being the center line of said outside diametrical dimension and said center line also substantially coinciding with the center line of said bearing assembly bore when said block is positioned in said bore; c. said block with its generally annular configuration having a central bore; d. said center line of said block being the center line of said central bore; e. said central bore having an interior diametrical dimension substantially the same as but slightly larger than the exterior diametrical dimension of the first bearing surface on which the block will be positioned so as to provide a rotatable clearance between said block and said first bearing surface; f. said block having a width approximately equal to the width of a bearing assembly for which said bearing assembly said block will be temporarily substituted in said bearing assembly bore and on said bearing surface; and, g. said width being said basic reference dimension.