I just put sound deadening b-quiet on the rear wall and the rear floor and it made a big difference in quietness. Now it seems like all the noise is coming from the motor so I have to do the front floor and up the firewall LOL.
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04.5 2500 4x4 qcsb sport laramie, Browns Diesel built 48re, BD flexplate, Mag-Hytec dd, Goerend triple disc, lock up switch, pxrb, fte resonator & hushpower, Optix, Airdog II 165, Smarty Revo, Ride-Rite w/wireless controller, S&B elbow/CAI, Quad X2, 315s.