Strange Humpback Whale sound from engine bay

T

timwiscowrangler

New Member
Joined
Feb 4, 2026
Messages
3
Location
Wisconsin
I have a strange Humpback Whale sound coming from engine bay......

Here is some info:

2008 Jeep Wrangler JK 2 Door Hardtop

The sound is very similar to the high pitch singing of Humpback Whales (at least what I saw on You Tube).
The sound is intermittent as to when it comes.
The sound seems to happen at 2500 rpm.
The sound ranges in intensity from barely heard to louder than my stereo at half max volume, seems to be speed related.
No sound parked regardless of RPM tested.
Seems to happen more/louder in the cold.
The sound is best described as a song, not a single constant pitch

Ive looked at:
Heat shields
Brakes / rotor / rotor shield
Checked for loose possible vibrating cables / possible vibrating metal in engine bay
Readjusted license plate to eliminate any vibration
Wiper arm

Important notes:
I recently had engine replaced and sound stayed the same

My best guess.........
1. A heat shield vibrating I don't know about or some other thin metal vibrating.
2. The front axle is dry/no grease and needs replaced.

Feel free to ask any questions, will update as I think of more useful information.

Tim
 
Does the sound go along with driving speeds? Only asking because I had a similar sound that drove me nuts. It would only do it between certain speeds. Found out it was my passenger side dust shield. It was ever so slightly tweaked and would start to rub the rotor around 30 but after like 45 it went away.
 
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JeepJeezy said:
Does the sound go along with driving speeds? Only asking because I had a similar sound that drove me nuts. It would only do it between certain speeds. Found out it was my passenger side dust shield. It was ever so slightly tweaked and would start to rub the rotor around 30 but after like 45 it went away.
Click to expand...

It does get louder (when it is sounding) as your speed increases. I have thought it might be wind dependent. But the odd thing it sounds like its coming from the engine side of the firewall.
 
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