Rear axle vent puked some fluid

[dan50]

I've put maybe 6000 miles on this thing since I bought it several years ago, and to be honest I have no idea what the fluid level is in the carrier, nor do I know what fluid is in there. But in all those miles, I've never had an overflow issue from the axle. Here are some pictures. The axle is soaked right where the vent screws in, and the exhaust, frame rail, and undercarriage is soaked in two locations - 1) where the vent hose ends, and 2) where the vent itself would shoot out if the rubber hose was loose... which it was since the zip tie I had on there came off.

I wiped it down, used a clamp on the hose that's on the axle vent, and took the back roads home. No new fluid leakage detected yet...