2006 vs 2005
#1
#2
I havn't heard of any major changes. There were several updates in the 05 model. The biggest update was the new 300 hp, 3 valve 5.4 liter engine was made standard equipment on all models. This replaced the standard 4.6 and 260 hp, 2 valve 5.4 engines that were used in the 03 and 04 model (as well as the older 97-02's). Ford also added the Limited, and King Ranch packages in 05.
#3