2004 Ford Expedition 2004 Ford Exepedtion Rattling Right Be

2004 FORD EXPEDITION
114,000 MILES • V8 • 4WD • AUTOMATIC
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ROGER_LEE_98
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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
Jun 10, 2010 at 3:15 PM
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JACOBANDNICKOLAS
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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?
Jun 14, 2010 at 3:29 PM
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ROGER_LEE_98
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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
Jun 14, 2010 at 4:06 PM
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JACOBANDNICKOLAS
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Roger,

The only thingI can think of that would be causing this type of problem is the trans control module (TCM). That is where I would strat trouble shooting.
Jun 18, 2010 at 12:56 PM