cold squeal 2001 grand cherokee
 

at or above 25 mph it will squeal. steady, no change in pitch with speed changes.You only get it moving down the road. nothing in park or raving the engine. sounds like it's coming from the right firewall area, but can't be sure do to the fact that no one will let me strap them to the hood and drive around. Some say bearings. I think vacuum sound similar to letting the air out of a balloon. after driving 30 or 40 miles it will quite. Warmed up i guess. Help it's maddening. sounds coming from engine compartment i think