Has anyone had or is having blow off flutter noise from the waste gate? My 6.7 has 23,000mi on it and I had a tranny update recently. Tranny was getting stuck in neutral between different gears. Had to let of the pedal then get back on it to get it to shift. I notice the flutter more often now. Going up a long hill and high gear. Low RPM. Is this normal or cause for concern? Turbo going bad or EGR just like the 6.0?