problem with vibration on 2012-13 tacomas

Just a little FYI had a vibration and grinding noise after adding a 2.25 leveling kit come to find out they have been having issues with the differential carrier assembly being the issue..took it to the dealership and head mechanic said it wasnt the leveling kit in his mind had to be something else. and it was, a WARRANTIED FIX the work cost $2 300 all covered..i had just added leveling kit and thought it had to be that, guess it just was perfect timing mechanic said with how cold its been they been having issues with some tacomas live in PA and it has been colder then normal. Hope this helps someone if there having same issue