Hello all tried searching in the forum for insight on this but my Tahoe is one of the AWD ones with 4 LO option only, and didnt find anything lol. The front diff has a low growl too it. Drives perfectly hasnt gotten louder and put 15k on it already (towing atvs and trips to MN). I changed the fluid to Amsoil severe gear maybe hoping to quieten it some but it's the same. Noise happens instantly if you tap the gas or accelerating. I was wondering if a friction modifier other the what's in the amsoil would help the operation of it. Thanks all what's your thoughts.