With my 06 TL, I drove it for a long trip this week (the first one) and whenever the speed is between 35 and 50 mph I feel the vibrations thru my gas pedal. The car is not resposnding swiftly at that moment. The AC is on.

Is it a known issue? I am further evaluating the exact characteristics like spped, rpm, gear etc when this happens.

If you have experienced any such then please let me know.

 

Further update -- 2006 TL (AT - non Navi - 950 miles)

When AC is on, there is a lag when I press the gas. Also when the speed is about 40, I feel the vibrations thru the gas pedal.

Also there is a lag when the gear changes from 3 to 4.

Any one facing similar issue?