Spring releasy typ noise when backing up

[michael90630]

I have a little of over 2 months old T4R 2007, SR5, V6. In the last few days, I noticed a strange noise when I back up. It does not happen every time. It sounds exactly like a spring --- BOINGG...G..G...... like when some pulls a stretched spring at the middle and releases it.

I am not exactly sure where it is coming from, but seems like it somewhere under the driver side under-carriage.

Has anyone heard something like this?

 

[nated05]

Mine does it as well every morning while backing out of the garage. Im pretty sure it has something to do with the drivetrain, do a search you might be able to find more info.

 

[blindside]

Mine does it too, specially when i backup, shift to D and quickly accelerate, or if i'm on a slight incline... from my observation it could be part of the brake or traction system because i could here the same spring sound when my wheels starts spinning

 

[pipspeak]

I have noticed a similar sound a few times... like a deadened "boing", almost a creak, from the front end somewhere. Happened when on full or almost-full lock at low speed and hitting an incline (like my driveway).

It's so rare that I just ignore it. One day I'll stick my head unde the car to check the struts/shocks. Could just be a piece of rock grinding against something.