This would seem like a question that would have about a hundred different threads, but couldn't seem to find too much. We are looking at purchasing a used 2020 T880, 510 HP MX-13, daycab, 18 speed Eaton Ultrashift MXP, for gravel hauling.
My question is on that transmission. We have an 2012 386 with the 13 speed Ultrashift, driver likes it, but personally I hate it. Any small movement jerks a guy around and it looks like first day of driving again. Downshifting is not aggressive at all. Found we are best off putting it into Low when starting to slow, so that it is functional on the downshift. Also has given other issues, but could be due to the fact it came from Ontario, is pretty rusty truck.
Are the MXP's any better control wise? I imagine they have fans and haters too. We have Allison 6 speeds in our mixer trucks, absolutely love those auto's.