I hear a sound like "SCREEEEEE" after i put my EXPD in reverse. I only hear this noise when I put my vehicle in reverse. I have a 98 EB 4x2 5.4 EXPD w/LS and tow package. I have a friend that had the same noise and his dealer had his trasnsmision replaced. I dropped my truck tonight at the dealer to see what he finds. Hope it is not the trans. I'll update when i find out what the dealer says.