new and need help

[89blacksub]

how is everyone. i have a situation that i was hoping someone could help me with...but first ill tell everyone a bit about myself.

i am origionally from Washington and Oregon but i am in the Army and stationed in FT Hood texas. i got back from Iraq a few days before Christmas because i was lucky enough to be on the advance party.

anyway my question is if anyone can tell me how to read the option codes in the glove box so i can find out what gears the truck has in the diffs (the rear went out the day after a 2200+ mile road trip from oregon to texas. it has 4X4 so i have to match the front and rears up. anyway thank you for your help.