Whirring noise coming from under Jeep

[Crazyman1304]

Hey all just looking for some suggestions or clues on a noise my jeep is making. Last year I was having transmission issues throwing codes, getting put into limp mode, etc. Local transmission shop quoted me $2800 for a rebuild so i ended up swapping in a used lower mile transmission from a same year TJ in instead. Which has been working great and even better than my old one ever did but now it's making noises.


It's now starting to have a cyclical whirring noise only when the jeep is in gear. Park and neutral no noise but in reverse and drive it whirrs until I get going then it completely goes away. It seems to get louder the longer its running.


Transmission shifts perfectly otherwise. The fluid is full I checked it in park with the transmission hot after going through all the gears.


I am attaching videos of it idling in neutral, reverse, and drive. Hoping someone has heard something similar but I can't seem to find anything on the forum

Neutral (No Noise "baseline")

Drive

Reverse

Thanks for any suggestions on what to look at!


2004 Jeep Wrangler 4.0 42RLE

 

[LONGJP2]

It's now starting to have a cyclical whirring noise only when the jeep is in gear. Park and neutral no noise but in reverse and drive it whirrs until I get going then it completely goes away.

I didn't hear your recordings; but if it's a ratcheting sound, then it's normal.

 

[Crazyman1304]

I didn't hear your recordings; but if it's a ratcheting sound, then it's normal.

Its not a racheting sound. It's definitely not normal. Ive had this jeep for 4 years and I daily drove it for 2 years and never heard it make this noise.