I feel like this is a dumb question but I'm going to ask anyway. I bought a 2005 Rubi 2 months ago and it looks like I have a pretty small leak at the bottom of my front differential. It's not dripping just kinda gathering up on the bottom and if I run my finger over it, I get fluid on my finger. So, I want to replace the gasket, what the heck fluid do I buy for this thing, it's my 1st 4x4. I do light towing of a jon boat and the rest it's my daily driver.
Also, how full do I fill it, until it's up to the fill plug?