Torque Converter buzz

[StealthR/T 93]

For a while now, when I put my tranny in gear, I can hear a buzzing sound coming from the bellhousing area. It only does it for about a second when engaging reverse, but when I put the tranny into any of the forward gears it continuously buzzes. What I have noticed though, is that if I increase the idle speed by about 100 RPM's to an idle of roughly 800 RPM, there is a pretty small "click", then the buzzing sound completely goes away. I *think* that the TC is controlled by the TCU (I remember hearing that somewhere), and that would make sense since the buzzing goes away when the TCU "should" begin to engage the torque converter for movement. Does anybody have any suggestions as to what it could be? It really doesn't seem like anything worth worrying about, but that buzzing is pretty damn annoying. For a minute, I was actually considering just raising the idle speed to eliminate the noise ...but of course, I wanted to check the forums first to see if anyone had any suggestions for me. Thanks a lot guys!

[StealthR/T 93]

Hmmm..interesting note...when the engine is not running but the key is in the ON position, I can put the transmission in Drive and the buzzing still occurs unless I depress the throttle. Seems like something to do with the TCU strangely...I am still contemplating whether or not I should just bump up the idle a little bit to eliminate this...but, again, this probably isn't solving anything, but just putting it off.

[StealthR/T 93]

Come on, ATX guys! I know you're out there!

After playing around with it a little bit more today, I've determined that it is definitely linked to throttle position. The best way that I can describe the sound is the sound a bicycle makes when you put a baseball card in the spokes and ride down the road...also mixed with the sound of a bound-up electric motor . Anyone know what I'm facing?

[StealthR/T 93]

Okay...so basically I've determined that it is a solenoid that is the culprit of all of this noise...driveability is not adversely affected whatsoever, the car feels very strong, and shifting/torque converter engagement is spot on. Basically what I would like to know, is will the longevity of the transmission be greatly reduced by simply driving the car the way it is? Like I have said, the solenoid shuts up after any type of throttle input, so it really is only existant at idle while in any of the forward gears. I was really looking forward to making this tranny good for strip/track use but also okay for daily driving (read: high stall TC, tranny cooler, shift kit, etc), so I really hope that something as simple as this won't hold me back once I get my car painted. Any input is greatly appreciated!!