Method for chipless tooth flank modification, in particular for chipless production of a crowned width, of a gear (20), wherein the gear (20) is fixed in a holding device (31, 32, 33, 34), the gear (20) with a die (10) assumes a starting position in which the gear (20) and the die (10) form an internal gear pair, the holding device (31, 32, 33, 34) with the gear (20) performs a wobbling movement about a gear wobble point on a gear axis (21), and / or the die (10) performs a wobbling movement about a die wobble point (TM) on a die axis (11), so that the die (10), in particular tooth flanks of the die (10), partially exert pressure on the tooth flanks (23; 25) of the gear. (20) exerts and reshapes the tooth flanks (23; 25) of the gear (23;25).