Can any 1st gen 4-Runner standard tranny be swapped into an '88? Can 1st gen truck trannys also fit?

 

First of all, an 88 (like the one you have) is a first gen 4Runner, Now as for an earlier tranny working as long as you don't have a 3.0 in your rig an older tranny should work (unless it's from an old 20r truck then i'm not to sure) But if you got an 22RE an older tranny should work fine.