Have a friend who traded in a 03 2500 2wd H. O. 48re 3. 73 gear with a 144k trouble free miles. Just WANTED a NEW TRUCK. Bought a 06 4x4 48re 3. 73 geared short bed. RAVED about the ride,how quiet and almost off the jump street it got almost 20 mpg and 13 towing a moderate size cargo trailer. Quess trailer and load MAYBE 6k. He calls toaday RAVING about what a piece of do do truch is with now 2800 miles. Says BAD vibration,noise from rear at 68 mph up that will run you out of the truck(claims just started over a few days) and how it feels like brakes on al the time. Says won't pull it way out of a wet paper bag. Says fuel mileage is the pits. Like 11 pulling and 14 not pulling. Went on and on about it constanly down shifting and won't stay in high gear on any kind of incline. Said old truck with same trailer hardly ever down shifted etc. YET claims NO time to take it in. Dealer did a QUICK look see while he waited and did do a driveshaft swap with no effect on noise or vibration. They said its GOT A ISSUE. Did NOT look into low power issue(friend had NO tiime) but said to them it pulled ok. Any thoughts any one?