Time for a did you know moment.....
Did you know that the autobox upgrade was described as being targeted at the 2.5TD around 2000 model year.
I have a suspicion that its smoother in order to put less load on the auto box clutches.....which for some reason have a habit of failing!
Thats interesting
, yet also odd :-/
If it was for 2.5TD, not sure they made a particularly good job of it... ...never been that impressed with the update on the tractor, esp wrt the change points - pops it in to 4th too early imho.
Additionally, its not as smooth at changing as the petrol maps, though that may be due to the extra torque going through it. I did wonder if this was a mechanical/hydraulic fault on mine, but all 3 gearboxes (
) have done it.
From my own personal experience, I would say its very, very worthwhile on all petrol models, not sure I'd say worth the cost on a TD :-/
I've had lots and lots of positive feedback from petrol ones I've done, and I know you have to. I've not done a tractor, other than my own, so haven't got a 2nd opinion on it :-/
We need a guinea pig... 
You are assuming that they were trying to make the change smoother....or were actualy trying to take some of the load off the clutches.
Remember that on the diesel the timing cant be retarded to soften the change points like they do on the petrol engine.
Good point, well presented

Still unimpressed with the changepoints though, esp 4th when cruising - slots in at 1500rpm, std tractor power doesn't come in below 2k...