Yep, it's what's called a "High Lead".A gal buddy of mine knows I work in the woods and kindly recorded a few episodes of the Ax-men series for me since I don't have cable and yes they actually had a short story on this style of high lead rig in one episode.It showed footage of Shermans in WWII to go along with the story.So, yes it seems to be basedd on the Sherman lower but more enlightened minds on here may be able to say by the pics just what model of Sherman.
Come to think of it some High speed tractors/prime mover had the same tracks ,suspension, finals so maybe -------