my tahoe makes a loud noise when 4 wheel drive is engaged on 1998 Chevrolet Tahoe

when i take it out of 4 wheel drive it is still making a noise but not as loud as before. has 130,000 miles never had this problem before

by in Saint Leonard, MD on February 14, 2013
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2 answers
ANSWER by , February 15, 2013
could be something in the transfer case
ANSWER by , February 15, 2013
or actuator motor,seek insp and diag