2004 Ford Expedition 2004 Ford Exepedtion Rattling Right Be

ROGER_LEE_98

MEMBER
2004 FORD EXPEDITION
V8
4WD
AUTOMATIC
114,000 MILES

Just started noticing this about 1-2 months ago. I have an 04 Expedition 4WD 5.4L V8 with 114,000 miles on it. When I am driving between 50-65 MPH, and going uphill, right before the vehicle needs to down shift (to maintain speed or accelerate), it makes a progressive rumbling noise that you can hear from the outside and feel under the floor boards. If I let up off the gas the problem goes away, or if I step on the gas right before I know it's going to shift (hard acceleration) it doesn't happen. Only happens when I gradually increase speeds or try to maintain speeds up a hill, and it needs to shift gears. This also is happening in 2WD, I have not tried driving in A4WD, so not sure if it would happen when driving it that way. I changed the Transmission filter about 1 month ago, along with trany fluid, but problem existed before this was done. Any help out there would be appreciated!

Thanks

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

Does it feel like the engine is missing, or the transmission isn't shifting soon enough and placing too much of a load on the engine? Have any lights come on?

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Monday, June 14th, 2010 AT 3:29 PM

ROGER_LEE_98

MEMBER
2 POSTS

There are no lights that come on, and it only happens when Im on an incline where the trany needs to downshift to pick up the RPMs. If I let of the gas when this is happening it stops, and if I punch the gas going up an incline it doesn't do it. I also just recently noticed that when Im driving around in A4WD, it doesn't happen at all when going up an incline. So for now, I have just left it in A4WD with no problems, but I would still like to find out what is causing this issue when it's in 2WD.

Thanks again,
Roger