Well, I don't have a code for you but I do know that my '05 DC SR5 has 3.9 r&p and rear LSD. I know this because I have the LSD sticker and blew the spider gear in the front and had to have it rebuilt.
Bought the truck this morning and I'm super stoked. It is an Arizona truck with no rust and one owner. The last time I owned a truck was 26 years ago and it was a 1974 tiny Toyota! Kinda made a full circle. Anyhow I've never looked up these tow codes but I believe mine is A/TM:ao1b/a850e. Any idea what that means? Thx!