Ariman,
I'm gonna go out on a limb, and say if you have a passenger side drop on the Tcase, you DONT have the same 7.5" front diff that we have in the Tacomas (95.5-present years).
From my previous post: "Front is 7.5", maybe same as early 4Runners have, but I am not sure."
My GUESS is -86 to -95.5 Pickups and runners may have same front. I am leaning more to 4runner, there seems to be some difference, TrueTrack has different part numbers.
Brian's pages are too old info.