Hello, my girlfriend has a 2001 Echo and it seems to have an intermittant issue of making a churpy squeek/squeal sound whenever the car is in drive. If in park, noise doesnt happen. Sound seems to amplify when the heater fan is on, almost seems vibration related. But issue becomes aparant regardless if heater is on or not. Anyone familar with this issue, or might know how to fix it? Thanks, Natas.