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The 8th digit of the VIN # can ID the engine. For trans, have to use the trans code letter on the door label.
Of course, a Ford dealer can enter the VIN into the whatsis system, and get a lot more specifics, since that looks up the actual vehicle build.
For the engines;
"L" is 5.4
"W" is 4.6 Romeo
"2" is a 4.2
There is also the 4.6 Windsor, but was only used in I believe 97-98
The 4.2 and 4.6 only came with a 4R70W, unless its a manual.
The 5.4 came with either a 4R100 or a 4R70W. It seems most of them after around 00-01 came with a 4R70W (unless a Lightning or Harley)
Don't quote me on that one though