I have been having problems with harsh shifting in automatic mode in my '04 4.4. Surges between 1st and 2nd when both up and downshifting. Problem was noticably worse when engine was cold but was still present after running for a while. It felt like the rpm's were too high and the car was lurching forward to the next gear.
Anyway, I brought it to the dealer and they said a service bulletin had been issued. Transmission software was re-programmed and so far so good, problem is completely gone.

Here is the info. from the dealer:

Shift concern
C/S harsh 2nd to 1st down shift
Check and advise
Tech drove vehicle/checked and found SIB 24-01-06
Reprogrammed the EGS

Anyway, just though I would post in case anyone is having similar problems