hey, im not sure if there is any techs on here ( im still kinds new to the site) i have an 03 touring 350z and i know they are infamous for having bad tranny problems. my car has 14k miles. there is a strong vibration when i let off the gas and come to a stop. is this normal? if you know a little about cars, its like in an older car when a bearing goes out. that strong vibration but in the front on the z. any advice? thanks

 

Mine started doing the 3kish driveshaft vibration as soon as I installed the solid trans mount.
Any mods on your car? 14k is really low for an 03!

 

yeah but no mods

 

Brake rotors or crappy tire

 

def not either of those.

 

It's still under warranty so take it to the dealer.

 

yeah i think its still under the powertrain warranty for 2 more months. and it seems like it would be a powertrain thing.

 

My car has done that since new in 2002. Vibration while decelerating, but not always. There was a topic about this a while ago. You are not alone with this. I don't think there is a fix.

 

Take it in to the dealer. Don't waste your time troubleshooting a problem that you don't have to.

What you describe isn't something normal that you should tolerate. The Z is noisy and tempermental sometimes but this doesn't fall under those categories.

That being said, make sure your wheels and tires aren't damaged somehow... just cover your bases.

 

I had a very similar problem when I bought my '03 with 29kmi back in june of 2007. I noticed it would grumble to a stop from about 20mph to 0. I recognized it during the test drive, and the techs replaced the front tires and the noise completely went away.

My assumption is that the previous owner had the the tire feathering TSB corrected, but left the feathered tires on. The opposing camber of the tires (now aligned properly) induced a load on the wheel bearings creating the loud vibration.

check your tread depth to see if you have feathered tires. Also, if your car is a manual), you can isolate the problem by turning your car off at 20mph, and slowing to a stop and see if the sound remains. putting it in neutral for this may also tell you where in your trans. the problem exists. Im not sure though, im not a tech.

good luck!