I finally got 2 sound clips of the sound. Just to refresh your memory. The sound only happens when the oil has warmed up a little. Somewhere between 140-160 degrees. After the truck warms past 160ish the sound goes away. I can be driving or parked. And the engine has to be above 2K rpm's. I think it has something to do with the oil cooler. When you listen to the sound clip the sound is what sounds like a boat horn. It vibes the whole truck and it is stronger on the right side. Sound was recorded from inside while driving.




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