the 3RZ in 4wd tacomas uses a W59 tranny...i'd assume the 2wd one uses a W transmission as well. seeing that toyota engine familes(R, RZ, M, A etc) always share the tranny bellhousing pattern with it's relatives(20R, 22R all share block patterns), i can say the bellhousing from a 3RZ will work on a 2RZ, and a 3RZ bellhousing is compatible with W and G transmissions.
however, i think the tranny from a 2RZ is also a W, so it should bolt to your truck's bellhousing