Dragging grinding noise

2002 GMC ENVOY
177,000 MILES • V6 • 4WD • AUTOMATIC
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APRIL GREEN
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Okay it was put in 4 all wheel on accident. I changed it back to 2h when I noticed it about ten minutes down the road. then about two weeks later my husband got into it went to put it in reverse and it felt like it got hung. then popped then it was fine. it just has this dragging scrapping sound that sounds like your dragging a can. it sounds awful. I need help, I don't have anyone that can come look at it and fix it. I just need to know what I need to fix.
Aug 20, 2019 at 2:19 PM
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KASEKENNY
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Hi,

When does it make this noise? Does it make it driving down the road or only shifting gears?

Here is a guide that covers the basics of grinding noises. However, depending on when this does it, we can narrow down what it could be. Thanks

https://www.2carpros.com/articles/vehicle-grinding-noise
Aug 20, 2019 at 3:46 PM