I just happened to notice this noise today because my window was down and was driving beside a wall. But it was kind of a rattling noise when it shifted up. My tranny doesn't even have 10k miles on it yet but the truck has 161k.
Any ideas on what this could be?

 

Nobody?

 

Does it sound like bb's in an empty beer can rattling around?

 

if it's a manual tranny, I'd say it's either the throw out bearing going bad or a seized pilot bearing.

 

Yes, it does sound like BB's.
And it us an automatic

 

Well first.. I don't have a solution, but I know it's inside the torque converter, because, I just did my tranny over and the noise is still there, and I didn't have the xtra cash to address that issue too.
Question; Does it only happen when you're in first gear and on the brakes and giving it gas ever so slightly? He said it won't cause any damage just a little chatter. Not sure I'm cool with that explanation. I wanted to know exactly what's making that sound.
So anyways it's in the converter if you want to get into it, and mines been doing it for 6 yrs.

 

I only noticed it shifting out of 1st, I haven't tried much of anything else.
Are they suggesting a new converter will eliminate it, or are they saying its just going to be that way?

 

I'm not sure I'd like that explanation either... If it sounds like a couple of bearings tumbling around, then it probably is...





Maybe its the bearings that ride on the transmission input shaft on the transmission side of the converter... (Just a wild guess).

Maybe a video clip will help..

 

I'll try and get a video clip. I will say it's not quite as loud since having my tranny fixed.