My ‘04 Tundra 4.7 TRD with 180k miles recently starting leaking front diff oil from the driver’s side half shaft seal not long after I replaced the passenger side axle. Not sure why the opposite side started leaking. Anyway, it dribbles about estimated half teaspoon over a couple days of sitting. The leaking side half shaft was replaced a year ago so it doesn’t have many miles. As long as the leak doesn’t get worse I’d like to leave it alone until that axle boot rips and/or that axle is shot. My plan is to top off the diff fluid at every oil change while the skid plate is off. Am I risking differential damage if the fluid level drops to the lower edge of the axle seal? Can I run thicker diff fluid in the hope to slow down the leak? I think stock calls for 75/90 synthetic in the front. I don’t run a lot of extended highway speeds if that matters much. If I’m risking diff damage I will change it sooner, just hoping to not be bothered right now. Have a lot going on. Thanks in advance.