Weird Transmission (I think) Sound

[JFA_Spyderman]

Yo,
On my 94', 2.3l, 5spd, whenever I am coasting down in gear, there is what i call a "whirring" sound. If I take it out of gear, the noise goes away. But I don't think it is the engine, the noise doesn't sound like it is that far forward.

If i give it a little gas so my RPMs are matching the tranny, or when the driveline is under power from the engine, the sound goes away.

I will also sometimes hear the sound if I lugg the engine (which I know I shouldn't do). Anybody have any ideas? Thanks!

 

[Nailzs]

check your fluid
that sound is probably the load being on the opposite side of the input and output shaft teeth, which its not really designed for(but it happens and lets face it, downshifting is a good way to slow the truck down)

 

[JFA_Spyderman]

Yo,
The fluid is full up to the fill hole, plus maybe half a quart. I am starting to keep my eyes open for a new tranny, however, this noise has been going on for the past +/-20k miles so we will see. Are these trannys worth rebuilding, or am i better off searching for a pull-a-part one if it comes down too it? Thanks!