I don't see any reason to go to that effort. The problem for me is that I wouldn't want that solvent to get into places where it can hide and prevent your fresh oil from doing its job. If there's goop and stuff on the ring and pinion I would just wipe it off with a rag and call it good.
On the other hand, some folks would check gear backlash, runout, and all that good stuff, so in that case yes I suppose you need to do a pretty thorough cleaning. Just depends on how much work you want to do.
Rising Sun Bio
2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering,
no more Sanden OBA
1FZ-FE factory lockers +
Safari intercooled turbo, CDL switch, cup holder, Metric TLC leather, heated seats, JDM switches, PUMA OBA.
Warn M12000 waiting for a bumper.
Limited TRD 2UZ-FE SOLD