Re: Automatic shift is stiff.
I am working on this same problem with mine ('00 3.0 auto).
I was underneath the truck one day and unbolted the shift cable bracket and was able to easily shift by hand the mechanism on the transmission. So I would agree it's not a transmission issue but a linkage issue.
I have now taken the column trim and half the dash apart to get to the linkage. Sprayed some WD-40 in there but it's late so I'll look more at it tomorrow.
'08 Volvo C30 T5, 6 speed
'05 BMW Z4 3.0, 6 speed
'04 Ranger XLT, 3.0, 5 speed
'62 Corvair Rampside, 3 speed