Where did you get the 3.54 info? There is no such thing offered from the factory. In that year, with a 4x4 V6 and auto trans, no locker, you will have 4.10. With locker you probably have 4.30. 2wd V6 can be had with 3.72 or 3.90. 4cy 5 speed 4x4 can have 4.56.


Here's a chart to decode your model code and find out what gears you have

http://www.sonoransteel.com/Toyota_axle_codes.html

Or, you can jack it up and count the number of revolutions of the tire versus the drive shaft.


138 mm is 5.4 inches. Your gears are 8" in diameter.


Diff drop in the front will help with angles, but the panhard drop in the rear will only center your rear axle after a lift, since it is off about 1 inch after a lift. Its really only cosmetic.