There's absolutely no harm in putting in diff fluid that has the limited slip additive in it in a non-LSD diff. None.

Unless you buy Red Line diff fluid with the NS at the back of the number, you're getting fluid with limited slip additive in it.

I redid my research and agree with you Kirk now, thanks for clarifying. I just thought it was funny because he ordered transfer case kit from ECS and could have just gotten Redline fluid to match lol

I think the scariest part for me is the trans fluid change because of all the horror stories. With that said though, there's a lot of variables that people may forget, like not following the fill instructions properly and not having enough oil in. I want to find a really good diy for the trans so that I can read it like 15 times before I actually do anything. The diffs and transfer case are probably pretty straight forward.

I loves me some Redline fluid, I just wish it was easier to get locally.

Diff fluid has a lot of mystery with it and I just wanted to clarify what I've learned from all my experience. For instance, from my racing experience I learned that one of the things you can do to increase the lockup on a limited slip is to use regular diff fluid and add less than the recommended friction modifier. On the race track, no one can hear your diff groaning. :D

why replace drain plugs?

They have built in o-rings now. Supposedly one time use though I've reused them.

Hope this helps.

https://www.youtube.com/watch?v=ZRrgmfM8VlQ&app=desktop

Isn't the transfer case just D3?

Up until 2003. From 2004 onwards they are x drive, which use a unique fluid.

The unique fluid is apparently unicorn tears based on the price. There is no substitute.