Sounds like the electric shift motor on your transfer case isn't functioning properly. You could try tapping the electric motor after selecting 4x4 HIGH, with the truck in park, crawl under and tap it lightly. Don't get carried away tapping it, and be sure it's in park.


GB

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2001 Edge Regular cab, auto 4.0L 4x4 4.10LS 8.8

1987 standard cab w/92 5.0/T5Z 31 spline 8.8 w/Torsen

1989 Regular cab longbed, manual 2.9 4x4 - Parts BroncoII's x 3