Biggest issues I see are: 1) Rear end goes from Dana 110 to a Dana 80.
2) Front diff goes from Dana Super 60 to standard Dana 60.
3) Wheels go from 19.5" to 17" - that means no more F or G load-rated tires.
4)Towing capacity remains the same, but payload drops considerably (I forget the # quoted, something like 500-600 lbs.)
'06 F250 6.0 PSD Crew Cab FX4
ARE contractor cap, SCT X3, Airaid, Edge Insight,
Coolant Filter, '08 Console, High Idle Mod, Bilsteins, Recon clear mirror lights,4" Magnaflow Turbo-back
'03 Explorer 4.0 V6 4x4 (for the wife)