high pitched noise

2002 4.0 184k miles auto When in drive or reverse, there is a noticeable high pitched whistling/bird chirping-ish sound coming from the trans pan of my TJ. It seems to begin once warmed up and will occur while idling, but goes away when moving. It stops when placed in park or neutral as of...

Hello All, I have intermittently been getting a P0057 code that will appear out of nowhere, usually in the middle of long drives. Then it will disappear a few drives later. This same pattern of intermittence occurs with this weird whining noise that happens only when my foot is not on the gas...