List of Mechanisms

Transformers

The leader of the Autobots who transforms into a blue and red 1994 Peterbilt 379 semi-trailer truck. Peter Cullen, who had previously voiced Optimus Prime in the original 1980s cartoon, was chosen to reprise his iconic role for the live-action films.

The Autobot scout and Sam's new guardian who transforms into a yellow and black Chevrolet Camaro (initially a 1976 model and later in the movie a 2007 model).

Optimus's second-in-command who transforms into a silver 2006 Pontiac Solstice.

The Autobot medic who transforms into a yellow 2007 search and rescue Hummer H2 ambulance.

The Autobot weapons expert who transforms into a black 2006 GMC Topkick C4500 is Ironhide.

The leader of the Decepticons who transforms into a silver Cybertronian jet. Frank Welker was considered to reprise his role, but according to the film's DVD commentary, director Michael Bay thought Welker's voice did not fit the character for this version, so Hugo Weaving was chosen instead. After Weaving left the role, Welker returned as the voice of Megatron in later sequels.

The Decepticon scout and interrogator who transforms into a black 2007 Saleen S281 police car.

Megatron's second-in-command who transforms into a Lockheed Martin F-22 Raptor. Adler had previously voiced several characters in the original series, most noticeably Silverbolt.

Megatron's third-in-command who transforms into an MH-53J Pave Low III helicopter.

The Decepticon hacker and Barricade's minion, who transforms into a PGX Boombox, and later a Nokia 8800. Howard Stern was offered the role but turned it down when his agent talked him out of it.

The Decepticon demolition specialist who transforms into an up-armed M1A1 Abrams tank.

A scorpion-like Decepticon and Blackout's minion.

A Decepticon soldier who transforms into a Buffalo H Mine-Protected vehicle.