Hello I'm new to jeeps and also the forum. I have an 03 TJ with a suspension lift (unknown brand and size), 35" tires, 4:88 gears f/r with Detroit lockers f/r. Noise started as a whistling type above 25mph. Flushed both diffs, trans and tc with no metal shavings or chipped gears. Noise still present. Replaced both front hub assy (1-was bad). Noise still there. Did some research, similar sound to serpentine belt so replaced that and idler tensioner. Sound still present. More research leads towards driveshaft. So I ordered a sye kit with cv shaft, because the TJ needed one. Any help or guidance to better troubleshoot so I can get back on the trails? Apologize if I didn't post enough info, or seems like I did enough research, but just hoping for some guidance. I appreciate the help in advance.