Diff and MT fluid recommendations?

[Mugzilla]

So, my 2024 has 6700 miles on it.

I have a new-in-box Nissan rear LSD differential. Zero miles.

My manual transmission has 6700 miles on it.

It appears Nissan uses $#!+ fluids. I (hopefully) still have access to my lift in the coming weeks.

What DIFFERENTIAL fluid should I fill my NIB diff with to break in the LSD? It will have the Z1 performance diff cover on it.

What TRANNY fluid should I put in my manual transmission?

 

[RobotAZ]

The trans says you can only temporarily use non-Nissan. That’s pretty rare to tell customers. I’d take it seriously, although the guys at HPL can probably talk sense if you want it. They literally know more than anyone about anything related to lube.

https://www.hplubricants.com/

Tranny on top in the photo. Diff at the bottom.

 

[Mugzilla]

LOL. I LITERALLTY screenshotted the same thing:

I found Red Line MT-85 as a GL-4, and their Hypoid LSD fluid at 75w-90, GL-5.

F it; I'm using Red Line. Every video I see of people changing their stock Nissan MT fluid it looks like black water pouring out.

The brand loyalist in me WANTED to use Mobil 1, but their MT fluid is GL-5, which, in theory, could eff up brass.

 

[RobotAZ]

I use Redline if I can, but I am cautious with the API spec. I used Redline MT-LV and whatever the diff called for in my GR-86 that I just traded away. I use it when I can. It’s very good stuff. Their non-API engine oil is Group V turbine lube, and amazing. Just don’t use it in a car that the oil never gets truly hot or it’ll hold water. It’s absorbs it but will get rid of it at normal temps. But granny going half a mile down the road and hour later half a mile back, you can get rust eventually.

 

[dogunbound]

I honestly can't see why all of a sudden Nissan made a transmission that somehow requires their oil and only their oil... I don't think it really matters tbh. Manual transmissions are stupid simple, so you probably could get away with throwing motor oil in the damn thing (maybe not for super long, but you probably could).

 

[5thZ]

Thanks for asking the important questions, @Mugzilla! I too will be adding a LSD and swapping out fluids on my MT (prior to track events, but after break-in period...still have only 23 miles on the car).