Gear whine in Explorer

[jcd302]

My wife's 2003 Exploder had a nasty growl/grind in the drivetrain somewhere. Would only show up after warmed up and slowing down (like an exit ramp). I replaced RF hub (little play), Both diff fluids (correct weights), but after I changed the transfer case ATF, the noise is similar to a whine a gear-drive or supercharger makes. It will do it costing to a stop.
I put Valvoline Mercon V as per the manual, but is there something else I can add? It is the stupid Auto 4x4 so I do not know if this has something to do with it or not.
I get a little concerned as this is my wife's ride and the family car. We make frequent trips to Chicagoland (250 miles).

 

[mylittleblackbird]

You're going to have to get the wheels off the ground and use a stethoscope to try and pinpoint it. That may be your best chance.

 

[mattc113]

im interested in this also...my GF's grand cherokee is doing this also. same symptoms.