Diff Lubes.
 

What are the diff weights your running? I need to go though mine and what to know what others are running. I do know that i have a fresh rebuilt center diff with 10k. Any input would be helpful!

I use 10k in my 8ight for mostly road use. Seems be about right. I wouldn't go with anything much higher. I am even considering going down 5k to reduce the initial load on the motor.