Transfer case and diff fluid recommendations

Can anyone give oil recommendations for the transfer case and the rear diff? Thanks.

 

This thread is a good read with a few recommendations:

https://www.mazdaspeeds.org/index.php?threads/how-to-mazdaspeed6-fluid-notes-diy-pictures.9850/

Personally I have the Redline in my diff. I tried the recommended Amsoil at first, and even with the Sliplock added it was still making some noise, which went away when I drained and refilled with Redline. I have the Amsoil in my transfer case, seems to work fine.