I've been hearing this humming when I drive and it gets louder when going faster, and it gets quieter when deceleration. Also when I'm steering into a left curve it becomes silent but steering straight it returns, more noticeable making right curve.

 

Time for new front wheel bearings.

 

this and...

I had a hum that got louder as I got faster, albeit from the rear...it was the ring and pinion...

cool van!

 

Thanks I appreciate it now that I got bearings changed she is a lot quieter and smoother
On to my next bump in the road hehe I had good a/c and good air flow now it barely comes out on high max ac, but you can feel a tad more blow when you're not accelerating

 

Blend door not operating correctly or opening all the way due to vacuum? Usually clogged check valve creates this.

 

If you are having an issue with the blend doors, check out our site.

 

If the air is blowing out the dash defrost vents you may have a vacuum leak somewhere..

 

If you are having issues with your blend doors, be sure to check out our website for replacement doors, you will never have to worry about again!