2013 Tundra rear axle requires an LSD additive?

Sep 10, 2018
Northern va
Hi all,

Replacing the rear wheel bearings and backing Plates on my fiancé’s 13 Tundra. Figured it would be a good time to change the diff oil too, it has about 60k on it.

When I drained it the first time I used an oil that had additive already in it. The oil I have on hand to use now doesn’t have it and I’m wondering if if I have to add any additive to it. There are no stickers on the diff saying to use it.

I did a bit of research and see that some of these trucks use an electronic LSD and doesn’t require it but I haven’t seen anything definite.

When I jack up the rear and spin the drivers side tire forward the passenger tire spins the opposite way, if that matters.