Awesome video! I recently installed the LSD in my RAV4 too. (video coming soon). I got lucky and the differential I found has the newer design where you can't see the worm gears. There's more metal in the carrier holding the gears so it's stronger.
RX300 through 6/00 have the larger bolt pattern stubs, past that they're the smaller RAV4 size stubs. it may be possible to just swap the inner CVs from the RX onto the RAV4 axle stubs but I haven't been able to try this yet. The case is completely different, but the rear mount bolt holes are in the same location and the front are not. This would require swapping to the rav4 case or making a custom front mount. The type of torsen is also different, the RAV uses a T1 style, shown in your video, the RX uses a T3, which has a stronger differential case and behaves slightly differently. I was a little surprised to see the RAV uses a T1, they're known to crack on Celicas. Besides that, not only is the flange bolt circle larger, but the actual stub is a different spline count, so you can't just take the RAV4 open diff stubs and stick them in the RX diff to keep your same CV axles. Did you happen to count the splines for the LSD stub? RAV4 Open diff has 23 spline, RX LSD has 24.
Thanks for your comments! Center diff lock functions totally normally, as far as I can tell the vsv activates the diff lock and switches off flow of vacuum until disengaged, so as long as I activate it while the engine has vacuum it works fine and is unaffected by boost. This could be an issue if the vacuum actuator leaked or if I tried to activate the diff lock while in boost. Ari’s Toyota Corner (another yota rav guy here on RU-vid) has converted his to use a electric linear actuator which is super cool, may go that route in the future.
