This is Bonecrusher, from the Bay Transformers movies, over Bowser. The model used was edited to reflect the textures in the movies better, and the truck form was created from scratch, and using the same texture as the main body, to save a lot of filespace, so that the main body could still be decently hi-poly

Model used:
https://steamcommunity.com/sharedfiles/filedetails/?id=2821750117&searchtext=