Nissan 370Z Forum - Rear Diff Oil, 75w90 vs 75w90NS

Nissan 370Z Forum (http://www.the370z.com/)

- Engine & Drivetrain (http://www.the370z.com/engine-drivetrain/)

- - Rear Diff Oil, 75w90 vs 75w90NS (http://www.the370z.com/engine-drivetrain/14474-rear-diff-oil-75w90-vs-75w90ns.html)

Rear Diff Oil, 75w90 vs 75w90NS

(added this as a post in my DIY thread, but figured it would be helpful as a standalone for searching later)

Does anyone know the difference between Redline 75w90 and 75w90NS? The 'regular' 75w90 is what I put in the rear diff during my last change. Reading the info online says it's not for manual transmissions due to issues with the synchros...I assume it's fine for the rear diff (and has been for me for the past 4k miles). Then there is the 75w90NS which is listed under manual transmission fluids but is GL-5 which is rear diff compatible. The description for the NS also seems to talk more about LSDs and improving locking ability.

Thoughts?

You used the right oil. The NS is for gear LSDs and not the viscous LSDs that the 370z has.

Cool. Started second guessing myself, then wondering if the other was better.