whinning or grinding?????

[lenschamp]

I have a 94 sport done right up(large) but just started noticing a wizzing,buzzing, grinding, whinning kinda noise as i slowly lay off the gas to coast while drivin in 2wd or 4wd, very noticable with cruize on too but only apparent when transitioning from gas to coast to gas, in that little range between slightly stepping on the gas pedal and laying off slightly to coast, anyone ever had this problem, was told it might be transfer case or torque converter does anyone have any help???

 

[Glacier991]

This may be a little difficult to localize, but I'd be first suspecting the transfer case....