Um... so, yeah. I've had the idea of a Decepticon that transforms into a 1961 Corvette Mako Shark, a car that I personally find beautiful. And it seems no one has thought of it before, which I find kind of dissapointing, so I had to fix that.
I tried using the style from Transformers Prime for its simplicity, and took some visual cues from my favorite Decepticon, the movie version of Barricade, like the crumpled chest and winglike doors and, especially the wheel-hands. I love the wheel-hands. Also added some shark-related details to highlight the name of his altmode, and, perhaps the most difficult of all, tried as hard as I could to avoid shellforming.
So, yeah, here's Geargrind, I took his name from the expression "grind my gears", which fits his obnoxious personality, and because he loves speed, so he overexerts his gears when racing in vehicle mode. He specializes in assassinations, compensating his relative weakness and fragility with precision.
I'm not very good at mechanical designs, I know.