Welcome to Transformerland, cyclownus!
Do you mean, "Do the Dinobots transform?" Yes, except when Grimlock and Snarl became non-transforming Action Masters.
Do you mean, "Do the Dinobots switch sides?" Yes--many versions of the Transformers story have one or more of the Dinobots rebel against the Autobots, sometimes joining the Decepticons, sometimes just striking out on their own.
Do you mean, "Do the Dinobots combine?" These Dinobots do
, but apparently people who know that story don't like it very much. These Dinobots do
too, but only their commander Grimstone has a robot mode of his own--the other guys are just drones who change from beast mode to arms or legs of the combined form.
i would guess the picture in your link is a fan's creation (or i could, you know, read the other replies you've gotten, since Minerva and Roadbuster apparently recognize the thing), and i think it's a VERY impressive one. Where did you find that pic? Are there more? (i've been to seibertron.com but i'm too lazy to search through it myself looking for your source if you have the website address already.)