Yep, did a search. I *believe* it runs 4.10s, but before I go to the trouble of using some 4.56s I have laying about I thought I would ask.
I have looked up codes but there is some ambiguity depending on whose lookup table you use.
I can always jack up the rear and put it in neutral and spin, but 4.10 is pretty close to 4.56 and 4.30.

2.7L 4cyl., automatic Xtra Cab.

-Bill
'87 4Runner w/ '96 5VZ-FE, 'Red Chili II'
'97 Taco XtraCab 3RZ-FE, 'BlackBean'
TLCA # 13257, Rising Sun 4x4 Club Land Use Coordinator
"He who stops being better stops being good." -Oliver Cromwell