PHILIP8N
Veteran Member
I know Kubota calls their tractor or my tractors 4wd and I've often times seen that only 2 of the tires would turn (spin in mud or on ice) when in 4wd unless I stepped on the locking differential which would then make 3 of the tires turn while one was still not moving.
Philip, what would you call that? I call it 3wd.
It is still a 4wd tractor, okay, so you have 2 or 3 tires spinning, but is it always the same 2 or 3 tires that does the spinning? With open diffs front and rear, manually locking diff rear, when 4wd is engaged, all 4 tires are pulling equally until the torque of one tires exceeds the traction capabilities of the surface it is gripping. The open diff is designed so tires on the same axle can travel at different speeds, ie, turning a corner. Air locking diffs front and rear would solve problem, but would make it difficult to steer. My F250 is the same way, but I have a limited-slip diff in rear, which is probably worn out by now. Chevy and Dodge same as well. Just not noticed as much in trucks cause you cant see the tires! Philip.