Looks like a 2WD, 04 XLT Premium w/ optional OEM folding tonneau. If your head unit can hold 6CDs and has a sub behind the 40 bench, then you also have the Audiophile option. Also available in this year and trim are cargo bed extender, side-curtain airbags, leather seats, and moonroof. No way for me to tell but it either has 3.73 or 4.10 rear differential ratios, with or without limited slip.
The monochromatic appearance became available on 04 and 05 XLT premiums and Adrenalins. Otherwise, a Sport Trac will have gray, plastic lower molding. The B-pillars are also color matched but I'm pretty sure this is true of the 03s too. Since it's an 04 XLT Prm, it'll have the high-series console.
That's a nice Silver Birch Trac. Congratulations Rick.
edit: ---
Here's some info from another thread:
The axle codes found on door sticker:
46 — 3.73 non-limited slip
42 — 4.10 non-limited slip
D4 — 3.73 limited slip
D2 — 4.10 limited slip