I was wondering, my transmission is the 46re on the 5.9 obviously, and while watching a video i made for someone on another forum showing him how mine shifts i noticed a whistle like noise when the torque converter locked when i was going up a hill. It only really does it when im going up this hill when i leave my neighborhood. 40mph the torque converter locks and my rpm's drop to around 1100 i always thought it was the belt or pully or something because it does make noises on occasion so i just ignored it.

Ignore the video and skip ahead to 2:38 up to around 2:48 and watch when the torque converter locks it makes a whistle sound. I always wondered what this noise was when i drive.

http://www.youtube.com/watch?v=Ae3wP...layer_embedded

 

The sound's not the best, but it sounds like the air intake to me.

 

You dont hear that whistle or whine noise when the torque converter locks ? You did skip ahead to the part i mentioned right ? I wonder you might be onto something i dunno. I do hear a wierd noise on the airbox sometimes when its idle.

 

I hear it but it is very difficult to distinguish on the video. It may be being caused by the air intake or a broken vacuum line as there is a lot of load being placed on the motor when at such low rpm's going up a hill.

 

I guess I'm the only one that doesn't hear anything.