This show featured the Autobots and Decepticons in a prehistoric setting, transformed into giant, animal-shaped robots.
If you're thinking of a different show, could you tell me more about it? For example:
* What kind of animals were the robots?
* What was the general tone of the show (funny, serious, etc.)?
* Was it a recent show or an older one?
The more details you can give me, the better I can help!