I had a shop swap my failing transmission. When I picked it up after completed, I noticed alot more road noise coming from the 4wd shifter area. It has the obvious boot above, in the driver area. Wondering if they didn't forget to put something back up under the boot? Can not find diagrams that might show a missing piece. Something that I can look for that might be missing or ideas for noise deadening that would be easy to just shove up in there (and not start a fire)??