The ornamental design for an automobilegearshifter, as shown and described.
FIG. 1 is a first perspective view of an automobile gear shifter in accordance with the present disclosure;
FIG. 2 is a second perspective view thereof; and,
FIG. 3 is a magnified portion of the automobile gear shifter encircled in FIG. 2.
In the drawings, the broken lines depict environmental subject matter only and form no part of the claimed design. The dashed-dot lines illustrate a portion of a figure that is magnified in a subsequent figure.