I have a 96 4runner, 5speed. I was just out doing a little driving on some jeep trail and had to use 4wd low for a bit. I then shifted back to regular 4wd. When I got back on the road, I forgot to shift out of 4wd. The 4wd light wasn't on at the time (it didn't light up until I parked the truck!), which is why I forgot to shift back to 2wd.

It was about 15 miles back home, 10 or so at highway speeds. Did I trash my transmission by driving it in 4wd like that?