Sorry I don't have anything in writing about different frition plates but based on the way the TSB is written it would seem they may have updated the friction plates.
The TSB 09-6-1 only lists 07-08 Expeditions.
The part number for the "Plate Internal Spline-Overdrive Friction Plate" is 6L2Z-7B164-CA.
For labor it lists the 4x2 as 10.9 hours and the 4x4 as 11.6 hours (mine is a 4x4 of course)
The TSB goes on to say
" Some 2007-2008 Expeditions vehicles equipped with a 6R75 transmission may exhibit a squawk type noise during hard acceleration down shifts (4-3) (5-3) and (6-3) downshifts. The noise is produced during the release of the overdrive clutch.


Matt