I've had my second Gen for a couple months now, and there's a possibility that I didn't notice it before, but recently I have been hearing a high pitched whistle coming from somewhere NEAR the dash once I reach 35-40 mph and above. I can't pinpoint the noise origin, and it's only when moving, not rpms, so I'm assuming it's from wind. I'm hoping people have had the same issue and might know which part is causing the whistle?

 

I as well have recently purchased a second generation SR5 and have the same whistle and have yet to pinpoint the spot, but it seems to be the worn old rubber gasket around the windshield, if I can locate the spot I plan on patching with some silicone. It's annoying, but somewhat expected with a 30year old truck, lots of tired rubber.

 

I have the same issue except mine only happens when the engine is abouve 3,000 rpms so I am assuming I am sucking in air somewhere lol