I rebuilt a 4Runner 5 speed years back. I believe it was from a 90 model. It was not too bad as long as I kept everything it perfect order when disassembling it. I had never done one (other than my 80s 944 trans) and it came out perfect when done. I ended up replacing several bearings and all of the synchros. It'[s a bit of an advanced job, but a rewarding one when finished.