Hello, I'm a new 2015 Tundra owner. 5.7L 4x4 CrewMax, 35's. 2100 miles on truck and just had Revolution 4:88 gears installed. Am getting a whine at 55-65 mph under light throttle. Coast is fine or acceleration is fine but light throttle cruising on freeway is annoying whine. I have all terrain tires, so can here most all noises. I had a shop with a 18 year gear mechanic do the install and had them install a 2nd set days later with the same result. Anyone out there with Nitro gears installed and any problems ? From what I have heard the Revolution and Nitro gears come from the same factory in Korea where most aftermarket gears are made. Any thoughts anyone. Very annoyed after a 2nd set install with same result. Thanks in advance for any comments.