Yup, 26000 km driving down the street doing 40 miles an hour. bzzzzzzzzzzzinnggggg is all I heard pulled over, put it in park. Rolled away in park. Called ford roadside, now waiting for a new transfer case. No idea why it happened.
Great question on “any warning”? I’ve had 2 sensor ( transfer case) indications on my truck. Ford couldn’t find a problem. Changed out sensor instead. The truckwas not in 4 wheel drive. Simply going down the road at 60 mph
They had to rebuild my rear diff about 6 moths ago. The driver side pinion seal went and the lube leaked out. I've heard of this happening on a variety of F150 trucks.