WOW, that would depend on where the drain plug is in relation to the clutch dog. Not sure how flexible your borescope is but it would have to be very flexible AND have its own light source too... But anything is possible...
Thanks guys. I looked at a cut away of a LU on youtube and I do believe if you had a small enough scope you could see forward gear dog clutch teeth. But the scope would have to be very small and have light. Not seen one like that.