In addition to four of the new designs for the Autobot characters in Transformers 4, which you can see here and here, director Michael Bay posted the first photo of Hound, the first generation autobot scout.
Bay also reveals a thin slice of information for Hound:
The always rugged and reliable Hound, one of the Family of Medium Tactical Vehicles from Oshkosh Defense.
Usually depicted as a Jeep in his off-screen mode, this will be his first appearance on the big screen in mode of the Medium Tactical Vehicle mainly used by the US Army.
Transformers 4 stars Mark Wahlberg, Nicola Peltz, T.J. Miller, Sophia Myles, Li Bingbing, Jack Reynor, and Kelsey Grammer.
The final film in the Michael Bay-directed franchise comes to theaters June 27th, 2014.
Click on photo for a high-res version of the image.

Hound wishes he were human. The dark, barren metalscapes of Cybertron no longer interest him. Now that Hound has been shipwrecked on Earth, he considers this planet his home. He sees humankind as beautiful and wishes he could interact with their ecosphere the same way they do, to feel what they feel and to see what they see.
He treasures his job as an Autobot scout, making good use of his ability to project holograms for added disguise. He uses this opportunity to explore the breathtaking caverns and mountainous expanses that Earth provides. He's a meek, benevolent soul, even compared to his fellow Autobots. He gets along with the more blood-thirsty of their ranks but not the most blood-thirsty of their ranks.