Cleaned my Highlifter up real good before the long ride to the shop,
After cleaning I took it for a ride in the hay field beside my house to dry it off.
I pud a clean white rag underneath the headlight pod to keep any oil from dripping down and getting it nasty again.
After the drive I noticed there was no oil on the rag. I drove it more and the tube with the dark oil in it had become clear again.
Checked crankcase and it still has fluid, ( I ordered new to change)
Buddy of mine said he had seen differentials foam up when they got hot.
So the guess is that it had enough mud on it to make it run hot and blow out the vent.
So far 3 days and all is good.
Thanks for all the help and insight.
if your outgo exceeds your income your upkeep will be your downfall.