[quote=Ole_270] ... The 400's were even less popular and supposedly were prone to the rear ends going out.
I had never heard that about the 400s. I do know that it became a problem with the 560s. The rear end in them was essentially unchanged from the Ms and even the Hs. When they tried to make the 560 a 5-plow tractor, the rear end was not up to it. There was a retrofit that was available for the 560s. If a 560 has had the retrofit, it should have a triangle stamped onto the ID plate.
