What differential oil should I use?

I have a 1998 Toyota Tacoma 2.4 liter 2 wheel drive 4-speed automatic transmission. I live in Texas where it's usually around 80°F, I'm stuck between running 75-90 or 75-80. What would y'all recommend?

 

https://www.yotatech.com/forums/f116/gl-4-vs-gl-5-a-201741/

https://www.ipdusa.com/products/705...MI7su7gcCO4QIVGx-tBh2Hrw68EAQYAyABEgLw6vD_BwE

Everyone here seems to use this and have great results, me included. Pricey but worth it.

 

I just switched to a synthetic diff fluid that should last me until about 150K miles!

Forget the name though...

 

Supertech. Cheap, easy to get, works fine. Made by Warren distribution.

At the end of the day, anything that is properly rated for your diff (GL5 I believe, so anything GL4/5 rated will work).. is going to be fine

 

Amsoil brand top of the line