2000 jeep tj automatic, 37" tires either 4.88 r 5.13 gears (installed on prior owner) . i am chasing a phantom whine. i suspected driveshaft or rear diff. i took the rear shaft out, re-serviced the rear diff. drove it in 4wd hi, still whines. it sounds like its something centrifugal (spinning) my friend has pretty much ruled out bearings. i tried going through the gears in 2wd without the rear shaft in to see if it might be a t-case or tranny prob. no sounds. starts 15mph-25mph and up. me and my wife did notice a smell after a short highway drive, as if somthin was heating up. maybe that was in our heads. i had my t-case serviced, topped off my tranny fluid (but not draines and re-serviced) . so, any ideas friends?