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My '95 F-150 had all the axel codes and such in the back of the owner's manual, so you might want to look at that if you have your owner's manual as well. If not, maybe the local Ford dealer can get you one.
Looks like you have 3.55 gears out back and 3.54 gears up front, mine has the same, 3.55 is a Ford ratio, 3.54 is a Dana...
Evan
86 F250 HD XLT Lariat Explorer 4x4 ex. Extended Cab: 460 with factory 2.25" catless duals to the muffler(still running the stocker aaargh)
/T19(syncroed granny low)/BW 1345/3.55 geared Full Floater 10.25 and Dana 50 TTB/ 265/75R16 Hankook FR04's on 16x8 Whitespokes(street tires... Need mudders)
78 F150, 351M/C6, eventually to be repowered with a 400