157dB

Yea, and dont use the clutch to hold the vehicle on hills at stoplights.
No matter how much fun it is, thats what the brakes are for.

moosestang

You need to hold some rpms, then let the clutch out in 4th gear. I don't remember the recommend rpm range, but you can find it on the net somewhere.

If you aren't hard on the gas, then I doubt it's the clutch. I'd check your control arms and panhard bar. If you have adjustable upper or lower, then be sure to check that the jam nuts are tight. You'll need to put a wrench on them because they may look tight, but they will move under load.

This isn't something you can diagnose over the net. Let someone else drive the car and see what they think.

ski

If the cams are the cause, then the problem should have started immediately after their installation, assuming you drove the car until it fully warmed up during that time.
Agree with the others that the suspension components should be checked for tightness, and if they're ok then have things checked over by a professional mechanic.

dschmink

All the suspension parts are perfectly fine. They're attributing it to clutch shudder/shutter whatever it Is as the clutch does not slip under load or high stress. Saves me 1100, booyah.

zanypunk

The suspension doesn't have to do with anything from your description. I mean, it doesn't hurt though. You mean shudder. lol
TSB
08-23-4
SHUDDER ON ACCEL - POSSIBLE WRONG TRANS CROSSMEMBER ASSEMBLY INSTALLED (EXCLUDES GT 500)
I might as well throw this one in too.
09-12-12
5R55S/5R55N/5R55W TRANSMISSIONS - SHIFT CONCERNS, LOSS OF 2ND, 3RD AND 5TH GEAR, INCORRECT RATIO DTC'S - PROCEDURE TO INSPECT AND REPAIR SERVO PIN BORE WEAR
I had like 5 Mustangs that came to my hand with this problem.