07 GT clutch issue?

If you are trying to "creep" at the 750 - 800 rpm idle speed, you are lugging the engine down, which will cause it to shudder and shake as you describe - you are just at the load/stall limit of the engine. Have you stalled the engine and had to restart?

I always have to "blip" the accelerator a couple of hundred rpms to about 1000 to keep it from bogging down.

Also the 40lb multi piece boat anchor we all know as a driveshaft has a lot to do with this bucking action that these cars seem to exhibit when trying to take off slowly. They bend and twist about as they start to spin.

A lighter one piece unit should take care of a lot of vibration and roughness.

I have the same problem with my 07 and i was told the exact same thing by my dealer. It sounds like ****. Adding the spydershaft helped some, but its still not as smooth as the older cable style clutches. It feels like the clutch engages/disengages at a different amount of pedal travel every time i push it in.

I had the problem on my 06 GT. It would feel like it was shaking apart, especially after it was running for awhile and warmed up. I couldnt hardly get it in the garage. I have driven clutches for ever and I knew this one was bad. I talked to one of my best friends, who owns a shop (500 miles away, unlucky me). He instantly told me, they burned it, slipping it when they loaded it on the truck. I told the Ford dealer it was TOTALLY UNACCEPTABLE to have a clutch grabbing! They installed a new one at about 600 miles. Found it to have a slight warped pressure plate and 4 burned areas on it. Just what my friend said they would likely find. No problem at all with the new one, feels great, just turned over 17K now.

I just bought an '05 GT, with 30,000 miles on it and I'm having the same problem. When I try to ease off the clutch, such as in traffic, at a drive through, etc. It will shudder badly. Mine also acts up more when its warmed up. I also get a rattling noise when releasing the clutch sometimes, even with the transmission in Neutral, and sometimes when I first start the engine. I took it to a dealership today, and had one of the techs ride with me, and I was unable to make it act up. He told me that I probably just wasn't revving it high enough, but I've owned several Mustangs, and one thing that I can't be accused of is driving like a granny I tried to get the clutch to slip by downshifting hard on the freeway, and lugging it in too high a gear, and it seems to hold well, but warpage or glazed spots might explain why it only does it sometimes, and mainly when hot.

I have a warranty on the car, but if I'm going to replace the clutch, then I'll go with a better aftermarket one. I will soon start modding this now bone stock GT, and be looking at getting upwards of the 500HP range, so what would be a good choice for a replacement clutch/flywheel that will hold up for the long run?

Sounds like a warped flywheel or pressure plate.