'03 4.0 4x4 making a weird noise
So the other day cruising down the highway I had my cruise control on at about 57 mph, I reach a hill still in cruise control and as I start to climb the hill this weird noise almost sounds like an air leak but static at the same time, comes from down below my feet and its not quiet by any means so I turned the cruise control off and it stopped, I got it back in overdrive without cruise and the sound never came back. I've tried to recreate it several times and every time it comes back when I'm going uphill with the cruise on in overdrive, I can even be in cruise and just rest my foot on the gas pedal and the noise stops. So I'm not sure what would be causing it but to me it sounds like something with the cruise control and or gas pedal. Any ideas?
Truck: 2003 Ford Ranger XLT FX4, 4X4, 4.0L SOHC, K&N FIPK, 4.10 LS, Reflexxion Cowl Induction Hood, Roadmax Billet Grille, MBRP cat-back exhaust, 33" Kumho MT's
Car: 1994 Camaro Z28, Corvette 350 ci LT1, K&N, Flowmaster, Pacesetter Headers, Strange 3.73's, T56 6-speed swap, Racing pcm tune and more.