when in the toyota i used to select 4 wheel drive then you had small pic on dash red line indicates to 4 wheels then when u put diff lock on it had a yellow line that indicated 4 wheels locked only for mud not for road as it would wind up the diff. on my terrano11 2.7 all i can find is 4h & 4L so where is the diff lock ?
It has a limited slip diff so it won't need a diff lock the rear diff in the surf had an open diff like u find in most road cars so when u need both wheels at the back to turn u push the diff lock button but u don't need to do that on the trannro as it has a lsd at the back :thumbs