Humming noise only on acceration

[V8Jake]

I have an 09 v8 4x4, I get a humming noise only when accelerating and it is worse with light throttle. Seams to be coming from the front. It also seams to have the downshifting bump which I thought was only for 2006-2008?

 

[vipersinu2]

I have an 09 v8 4x4, I get a humming noise only when accelerating and it is worse with light throttle. Seams to be coming from the front. It also seams to have the downshifting bump which I thought was only for 2006-2008?

I am trying to figure the same issue. I have 07 v8 mountaineer AWD with vibration from 10 to 35 and then a real hard bump around 35mphs. I think it is the awd disengaging.