J30 diff fluid . . . can i use 75w90?

[SR240Z84]

So, I've been reading and everyone says to use 80w90 but I have 2 quarts of Redline 75w90 gear oil and I wanted to use it. Would it be allright if I used that instead of the 80w90? Is it going to be that big of a difference?

[mxexux]

For where we live it will make almost no difference. Make sure you add the frinction modifier!

[shiftdrift]

yeah, it'll be fine.

[az_240]

For where we live it will make almost no difference. Make sure you add the frinction modifier!

With a vlsd you don't need friction modifier... that is mostly for clutch types. 75w90 is fine.

[SR240Z84]

awesome! No extra charges for me!

[mxexux]

FSM states that you need to add friction mod. to the gear oil....

[SpurlingBuilt]

agreed, friction modifier required, SHOULD BE NO MORE THAN $8