From the time I bought this 2005 4.0 auto this summer (50k miles, currently 52k) I had a faint "noise" for the lack of better description that I could sorta feel at around 45-55 mph. I noticed that if I turned off the overdrive it went away.
A month or two ago had the spacer lift off that was on when I bought it taken off and changed to springs and put on bilstien 5100s. It was about the same height, maybe a hair higher than the spacers.
At this point I had a vibration/noise that was enough to make the dash rattle from about 5 to 15 mph. When I took the jeep back in for the re-torque and check I had them check it out and they said it needed a transfer case drop kit. So I had them do that and sure enough, the 5-15 mph issue went away.
But now the noise/vibration is worse at 45-55 mph. Its not a strong vibration but its a fast one,,, its like an electric razor or something and it sorta oscillates.... wah wah wah wah wah wah and still stops if I turn off the OD.
Is this a sign the OD is about to cause problems or is it the entire transmission, is it because of the lift, the transfer case.
I'm going to take it back to the shop because I'm no mechanic, but I wanted to get some feedback from everyone here.