Why does my gear oil smell like butt???
I pulled the differential cover yesterday before pushing the truck back into the garage and letting it drip the gear oil out the rest of the way overnight.
I noticed when I pulled off the cover that it stunk, but now that it has been in my sealed garage overnight, I can smell that putrid odor and it almost makes me want to vomit!
Is it because it's 7 year old gear oil? Do you think it got completely worn out from 130,000 miles of use and just burned up?