gear changing

What is your question?

don't hear gears changing only hear a humming that gets louder the faster you go.problem started 2 weeks ago after i heard 3rd gear i did nothear 4th or fifth then yesyerday i do not hear any gear changes

What makes this problem better or worse?

the faster you go

How long has your 2007 Pontiac Torrent had this problem?

about 2 weeks