When I accelerate I hear a noise that sounds like a gurgling or gasping at roughly 2500-3000 rpm. I remain on the gas and the sounds eventually seems to work itself out, however appears again and again. The sport trac accelerates fine, but this noise has me concerned for a possible repair ahead. I am about to make a cross country trip from New Jersey to Oklahoma and the last thing I need is a breakdown along the way. Thanks in advance for any input.