shudder

So my R-spec has been doing something strange. In gears 3, 4, and sometimes 6, when I get on it, I get a random "stumble" and "shudder" feeling reminiscent of what my Firebird would do when the ignition wires were arcing against the exhaust manifolds. Does anybody else have this problem? Is it...

I have a 3.8 premium 2012 Genesis with 39,000 on the odometer. This has happened twice to me after I have been driving on the interstate, and come off the exit ramp to a stop light. The car shudders and acts like it is not getting any gas, or that it wants to shut off right there on the ramp. It...

When braking the car would shudder. Car has 38k miles. The right front rotor had hundreds of dark spots on both sides and several groves in the front of the rotor. Both side pads looked good with plenty of life left. I just finished replacing the front pads and turned the rotors on my 4.6. The...

I have a vibration that occurs almost every time I come to a stop and then accelerate. It's most obvious when driving stop sign to stop sign. When I give it the gas, I feel a rumble directly under the center console as the car gets up to speed. It's short and is gone once I pass through 10-15...

((Sal- Can't seem to post things in the Needs Dealer Atten. section)) My dealer is running this one up the Hyundai flag pole since so far, no ideas what causes it--- Here's when this happens--- 1. Going up a slight incline 2. 30-ish mph. 3. In 'D' (but checking, the car is in 4th) 4. About...