Ok guys, The rear axle gear oil page as stated in my manual states to use 85w-140 gear oil.with a MIL-L-2105D or MIL-PRF-2105-E REQUIREMENT.
Also it states to use 29.2 pints(29 pints =
3.625 gallons when refilling......?
What is the best to use? Synthetic or not? Brand?