What is and what is approximate cost of a transmission bearing? on 1997 Ford Expedition

The truct makes a noise when the accelerator is released

Asked by for the 1997 Ford Expedition
most likely a overhaul issue. approx cost 2500.00 to 3000.00
thanks but i am being told just bearings need replacing. Gears are shifting ok. I don't understand about the bearings??
sounds like the old get them in at one price then after its apart,SELL THE OVERHAUL. BE CAREFUL