well I was idling in a drive through and I heard this loud sound I thought it was the car next to me so I shrugged it off until they pulled away and it was still there, I shifted my car into Drive from Manumatic and the sound went away!

I put it back into Manumatic and the sound comes back hmm

Here is a short video, I amplified it a bit so you can hear it better. It almost sounds like a belt?


Update 2/2/11 https://g35driver.com/forums/5648183-post31.html

 

Mine used to squeak when I moved from MM to D and after a belt change the sound went away.

 

o snap !!! :-(

 

Yea, I need to Jack the front up and put my parking brake on, have someone hold the brake and then just shift from D to MM and try to figure out were its coming from.

If its the belts that would be a bit odd eh? RPM doesn't fluctuate at all. It also kinda sounds like metal spinning scraping on something?

 

I don't think It can be the belts. Nothing changes to the engine when you are stopped and switch between d and mm. The torque converter ismstill loaded up the same.

Hate to say it....but I'm suspecting it's internal to the trans.

 

^ Thats what I am worrying about, but I got my car from the dealer certified so I have CPO warranty untill next year I believe, need to find the booklet.

I changed out the fluid at 39k at the dealer I got the car from. They flushed it with 13 quarts of Matic-S.

CPO booklet says it covers
So I should be covered if anything is wrong.

 

I just went and tried to get it to do it again. The noise only happens when the car is idling in MM, if I give it some gas the noise goes away. as long as I am over the notch before 1k it goes away.

very weird hmmm

 

Been beating around in MM too much lol

 

^ lol, if you call highway driving beating then sure :P

 

Don't you always drive in MM?

 

Yes

 

Probably wore it out lol

 

^ lol silly its computer controlled. Instead of the computer changing gears I am telling the computer when to change gears.

 

Aparently something does change though when you click over to mm.

I haven't used mm in weeks.....I forget my car has it at times

 

Lol aparently, I am interested in what changes since it does not seam like something does. Well ill keep you guys posted as it happens. on cold start as well as driving on the highway for 30 miles the noise is still there.