Okay guys! So since I got my 2002 Jeep GC, I've noticed that on idle it has this faint chord noise. It's like a squeal, that literally sounds like baby birds chirping. It can only be heard from under the car, so that eliminated any belt problems I had in mind. So I took it into the shop, put it on the lift, and me and the mechanic were baffled. It was coming from the transmission area, and we have no idea what it can be. The fluid is clean and brand new and the tranny was just serviced. We have no idea what it can be. No vacuum leaks, no belt problems, nothing. Everything else is perfect except this little noise. Any idea what it could be? Car runs mint and shifts mint. I HONESTLY AM BAFFLED. Lmao! Thanks guys! Let me know if you have any ideas!