Loud Front Transfer Case Center Diff with 4LO?

[JorgeR]

I tested my GX’s 4 LO and locking transfer and locking differential. It was very loud and winy with 4 LO engaged. Is that the same for other’s? My 4Runner did not sound anything different in 4 LO. I’ve never had a vehicle with a locking center diff so may be that is it?