I have one I bought used 1.5 years ago. Got a noise that 2 different dealers can't figure out. (One tells me there is no noise) seems to be something with the torque converter clutch. Growls when under load until clutch disengages & then no noise.
Had right side exhaust manifold & studs replaced. Pinion bearing. Right front axle. (4x4) water pump replaced. Replaced fan clutch & serp belt 1st day I owned it. Check engine light came on but don't recall the issue. Software update too. Bought it with 50k. Has 68k now