Very odd hum/whistle
#1
Very odd hum/whistle
Very odd noise, need some help figuring out if I need to attempt to have the dealership recreate.....could be a long process.
2010 22K miles; EL 4x4
When driving on interstate (anywhere between 60 and 75) at times a hum will start (probably every third trip). It sounds like it comes from the passenger side. Its reasonably loud. When I accelerate hard it goes away, when I coast or have really light acceleration it comes back. Its a solid hum/whistle...it doesn't change pitch.
Any ideas? Anyone seen something like that?
2010 22K miles; EL 4x4
When driving on interstate (anywhere between 60 and 75) at times a hum will start (probably every third trip). It sounds like it comes from the passenger side. Its reasonably loud. When I accelerate hard it goes away, when I coast or have really light acceleration it comes back. Its a solid hum/whistle...it doesn't change pitch.
Any ideas? Anyone seen something like that?
#2
#3
#4
jack up the front of the truck with the motor running
spin both of the front tires. if the front driveshaft rotates, or tries to...it means you have a hub that is failed, or the some part of the vacuum system has failed.
after you hear that noise, pull over really quickly and do a touch test of both rear rims. if the e-brake is dragging on either rear wheel, the rim will be rather hot. You may hear 1 side dis-engage, but it's better to be for certain. the 07+ Expy is based on the 04-08 F-150. The 04+ F-150 has a bad habit of having the rear e-brake freezing up.
spin both of the front tires. if the front driveshaft rotates, or tries to...it means you have a hub that is failed, or the some part of the vacuum system has failed.
after you hear that noise, pull over really quickly and do a touch test of both rear rims. if the e-brake is dragging on either rear wheel, the rim will be rather hot. You may hear 1 side dis-engage, but it's better to be for certain. the 07+ Expy is based on the 04-08 F-150. The 04+ F-150 has a bad habit of having the rear e-brake freezing up.
#5
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