I have a 09 gt500. (factory no upgrades yet) when I pull out from a dead stop the car has a vibration in the rear, almost as if the drive shaft was not balanced or the rear end is slipping. Maybe it is just me trying to get used to 3.31 rear end?? Does anyone else have this problem. The problem does not occur if you pull out from a rolling stop just when you are completely stopped. Also what are some good upgrades for the car, it seems that everybody makes them but who are the reliable ones.
Thanks

i had that too, scared the heck out of me the first time, give it more gas, it's a learning curve to drive these beasties. I was told by serveal folks that is the 3.31's and SC combo, and normal.

Sounds like the normal clutch chatter.

Let out the clutch faster, and if the feeling/sound goes away... then that's it.

The car has a fairly steep learning curve, but you'll catch on.

how hard is the vibration? can you feel it throught the whole car or is it just a mild thing that you notice?

You can feel it, it is very noticable. I thought I had a problem as well, but just needed to get used to the clutch. All of my other Mustangs were cable/rod driven and this one is hydraulic, so once I found the right combination of gas/clutch pedal no more shudder.

Stew