Automorph Technology

Automorphing is a localized semi-automatic transformation. The term is used to describe the mechanics of the Transformers movie toys that attempt to recreate that visual style of the film's transformations within the limited framework of an action figure. Utilizing gears and other mechanisms, Automorphing moves multiple pieces of the toy when a single piece is moved. For example, the Voyager-sized Ratchet toy's kneepads rotate forward as his feet are pulled out.

While the Automorphing term originated with the Movie toyline, many toys have previously had similar features, such as Energon Skyblast's head rotating to face the front when his chestpiece is turned right-side up.

Most of the "main" Movie line Transformers figures have at least one Automorphing feature. Leader class figures feature more Automorph parts than the Deluxe and Voyager figures, and the only ones confirmed NOT to have them are the Legends class, Deluxe Scorponok, Deluxe Barricade, Deluxe Bonecrusher and Deluxe Protoform Optimus Prime. Leader class Optimus Prime features three Automorphing gimmicks (four if you count the legs separately).

From Teletraan I: The Transformers Wiki, a Wikia wiki.