Got the fluid and filter changed . No Flush. Transfer case drained and filled. I also had tech check torque on valve body bolts . He said everything looked really good as far as nothing in pan . He did say a few of bolts were not up to spec and torqued them to spec. I did have the Trans BUzz when going in to park since truck was new . Now the buzz is gone. I didn't want to do the TSB for new valvebody , because they will do a reflash and i don't want to update my tuner and all that crap . The Tech commented on my full race catless down pipes, they looked really nice , i known him for years and he did a lot of warranty work on my Raptor. Check your valvebody bolts if you have the Trans Buzz.