Seems to always happen under acceleration. I can feel it through the steering wheel. Anyone else noticed this? Do you think it's the tranny? Thanks

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White 97 XLT SC 4.6, 4X4, 3.55ls, door cracks, tow pkg, long bed, Rhino liner, Owens running boards

 

I think it is. It's common on the 4R70W transmission that's in your truck once the transmission fluid ages.

The solution is to do a complete transmission fluid change. Either drop the pan and drain the torque converter, or use one of the quick lube places that does a full change.

Mark

 

I just had it changed about 5000 miles back.

 

I just purchased a 2000 F-150 with the 5.4 and the 4R70W. I have 6K on it now and I am noticing the same problem. It occurs at around 1700 RPM. I can feel it through the gas pedal just a slight vibration. I guess I will change the tranny fluid at 10K and see if this helps. As long as it dosen't get worse I suppose I can deal with it. I just don't want them to put another tranny in because Lord only knows what they will scew up then!!

Let me know if you find anything out.......