You can also use AW grease in the front gear diff.
Makes it real sticky and won't get loose when it heats up but gets a bit tighter
regards Roy
Originally Posted by
Raman
I switched from spool to front gear diff recently and it's working like a charm for me. Instead of oil, I'm running it with Mobil 1 axle grease (red stuff) I learned about it when I ran 1/5 scale. So whenever I want to tighten up a gear diff to the max, I run it. Its heavy, doesn't over heat an remains consistent and it doesn't need maintenance