Abstract: Linear gearing primarily intended for use in connection with so-called transfer tolleys in automatic parking buildings. The transfer trolley includes a first carriage (101) which can be moved in at least a horizontal direction, and a second carriage (102) which is connected to a first carriage for movement from a first end position, in which the second carriage is located within the horizontal extensions of the first carriage, to a second position in which the second carriage has been moved in its longitudinal direction and the longitudinal direction of the first carriage and is located completely outside, or substantially completely outside the horizontal extensions of the first carriage.