Mobil 1 Synthetic Gear Lubricant 75W-90 all the way.. you can find if anywhere.

 

LE1605 all the way.. I'm actually still running off my surplus of LE607, but I'll be switching to 1605 asap. I'm running it in the winter now too (gets down to below zero here, but mostly in the teens and 20s) and nothing has gone boom.