RE: Whooshing - airleak sound from brakes
This won't help with your problem, but might easeyour concern a little. I bought a new 1988 Ranger S/C 4x4 XLT. It did the same thing. Sounded like air brakes releasing. Never did find out what it was,never had a problem with the brakes andI drove the truck for 14 years trouble free.
2016 Ford Fusion SE (1.5L Ecoboost)
2015 Ford F-150 Lariat Supercrew (3.5L Ecoboost)
2010 Lincoln MKZ (3.5L DOHC)
2007 Ford Focus SE (2.0L DOHC) A.K.A. "Zippy"
2004 Ford Freestar Limited (4.2L OHV)
Generac 17.5KW Generator (33HP Twin Cylinder)
Farm Hand 60 Gallon Compressor (3 Cylinder)
AMSOIL in everything I own that I can get it in...
"Have a good day, and a better one tomorrow"