changing differential fluid

[triumphtrident First Gear Find all posts View Profile Close triumphtrident]

The differential on my Miata (2002 Torsen Type II) is noisy (whine at constant speed or throttle off) and I'd like to change the fluid. Since it is a LSD I'm sure there is a specific fluid or type needed. Can anyone help with that.
Triumphtrident

[CAKELIE Second Gear Find all posts View Profile Close CAKELIE]

I've always used Redline 75W-90 GL-5 oil. It takes 1 quart.

Also be sure to remove the fill plug before the drain plug. ;)

[miatastuff Lives On MX5Atlanta.com Find all posts View Profile Close miatastuff]

While you're under I'd check the PPF alignment. I see that causing a whine way more often than a diff. Check the u joints too while you are there.

[sharkythesharkdogg Lives On MX5Atlanta.com Find all posts View Profile Close sharkythesharkdogg]

Don't forget some NB2's had a Tochigi-Fuji differential with a higher failure rate for whatever reason. Don't know if it was the design, a bad batch, or what. I think the problem didn't crop up until 2003, but it's something to keep in mind if the noise doesn't clear up after a few attempts.

[triumphtrident First Gear Find all posts View Profile Close triumphtrident]

Thanks to all. Very helpful.