driven gear/speedometer assy

Hi people,

had an annoying leak from an LSD box i installed from the top of the gearbox driven gear, after dropping the box to take a look i noticed that there wasn't a seal in place? i have ordered a seal from toyota so just waiting for that...

question is would it be possible to insert this seal with the gearbox back in place so i can get cracking on without waiting for delivery of the new seal?



It's a bit awkward to access when the box is installed. If I had the choice I'd do that one on the floor instead tbh.
did do it on the floor in the end...

really strange to have a leak from that location, and there was no evidence on any forums that anyone had this issue before, i think i must be cursed lol