I like the Tractor for a number of reasons, its close to Perfect. The truck is all wrong, (great cargo bay ++) The suspension of any 1 wheel is correct, if 1 wheel has a small rock under it, it rides over it. It handles like a dune buggy, but definitely has the mass of a truck. The centre of mass is too high for the suspension, or too heavy. The brakes also lock up very easily, like there is insufficient downforce on the wheels.
And she rolls like a barrell !