Do you notice any hesitation when you shift from forward to reverse on the Dyna 4?
My NH TN85A makes a solid but smooth change in direction with the shuttle shift but the MF5455 I had last winter seemed very sluggish - a 3 - 4 second delay - when shuttling to reverse.
The dealership eventually took the tractor back since it had an endless litany of woes. They were very good about it, just charging me rent for its use. I was never so glad to see a tractor leave the premises after 6 months of tranny troubles and other stuff.
I've spoken with a lot of other owners and dealership service managers and they seem to agree that mine was a lemon.
Now I've come across a low-hour tractor like it and am scared to try it again.