Nevermind, my memory fails me.
Animated Series
The creation of the Dinobots was almost happenstance. One particular day at Autobot Headquarters, the Autobots detected unusual seismic activity from within the walls of the cave. Ironhide investigated the disturbance and found the fossilized bones of dinosaurs. After researching more Dinosaurs, Wheeljack made the suggestion that, because of their brute force and power, dinosaurs working for the Autobots would shake up the Decepticons. Ratchet agreed, suggesting robotic forms and Optimus Prime authorized the project.
Shortly after the Dinobots were created and unveiled, but during the presentation the Dinobots went awry due to their lack of intelligence. They began to ransack Autobot Headquarters, inflicting major damage to Teletraan I. Wheeljack managed to subdue the Dinobots with his shoulder-mounted magnetic inducer. The Dinobots were deactivated and stored in the cavern where they were constructed. Later, when many of the Autobots were in peril, the Dinobots were given cerebral upgrades increasing their intelligence to where they possessed broken language. The upgrade allowed them to follow instructions and be sent into combat.