I posted most of the following on MUD, but figured I'd post here too..
When I test drove it, I noticed the truck was quite sluggish and had hard shifts after taking a while to finally shift. But, at hwy speeds, especially at 50-65 mph the truck's transmission, tranny, or torque converter shutters pretty bad. Back off or drop it into 3rd and it goes away. It seems to do fine on flat road (but not problem free), but especially occurs when starting up a hill.
Did a partial Rodney flush, did everything but waste a ton of fluid by actually flushing through the transmission, and it helped DRAMATICALLY at city speed driving, but still has the shuttering issue at hwy speeds. And what I mean by helping in the city, the truck drives and shifts much more smoothly at lower speeds and has a better indication of power.
I do not get to drive the truck much, because I work out of town and I do not trust it enough yet to let my wife drive it to work, so it gets driven only a few times per month. I wonder if driving more often would help?
Any suggestions??