1998 Exp, 4x4, 4.0
When slowing down, have a noise, kind of loud,not metal to metal type but just a load roar. Once you let off the gas it does it till you come to a complete stop. It gets quieter the slower you get. I can give it the gas and it will stop and begin again when slowing down. Everything works ok. Anyone have this type of problem or knows what my problem could be? Thanks GG

 

Does the noise vary with the engine RPMs, or the speed of the truck? If it's RPMs, could be the IAC. Not sure if you are describing an engine noise, or a drivetrain noise.

 

I believe it is drive train noise. when it starts after you let off the gas, it keeps making the noise as long as veh is moving. It keeps getting quieter as it slows down. Thanks, GG

 

Clutch pack was bad in transfer case causing noise.