I'm coming up on 30K miles here so I was looking at the "Scheduled Maintenance Guide" that came with my owners manual.
It says that at 30K, the rear diff oil change is recommended "only for Preunners and 4wd vehicles with an optional limited slip differential". It goes on to say that those trucks without a limited slip only need to "inspect" the diff oil....I have a 2009 Prerunner SR5, which does not have a mechanical LSD.
So I got to looking through the other mileages and at no point at all does it say the diff oil in a non-lsd truck needs to be changed, ever.
This seems ridiculous to me, and I'm going to change the diff oil at 30K regardless, unless someone convinces me otherwise.
I wanted to see what others have to say about this, or am I just reading it wrong?