Well now knowing that, I got lucky as hell mine didn't leak when I replaced it with the diff bearing.
Knowing Tacoma's I would say that's probably always it.![]()
but I'm not sure that's it. I just replaced both sides ~25k miles ago.

I replace mine about the same interval I change the diff fluids (30k) so that sounds about right for them to go out. I believe the owners manual needs to add this periodic maintenace in![]()
yeah it should definitely be in the owners manual.Knowing Tacoma's I would say that's probably always it.![]()
but I'm not sure that's it. I just replaced both sides ~25k miles ago.
Those front diff seals are a total pain in the dick. I think I replaced my passenger side one 3 or 4 times to get it to stop leaking. The key is to not press it too far into the diff or else it will just leak all day. Flush for the drivers side(-0.0177 to 0.0177 in.) and some weird ass # for the passenger stub tube seal (0.1890 to 0.2284 in). Numbers taken from the FSM.
Put my new radiator in. Works like a charm
Replacing my UCA bushings tonight... that should be fun... ugh
