I have two 2.4L NA Solstices. Engine in the AZ car is smooth as silk at all rpms at 28,000 miles.
Engine in the OH car shakes the whole car at 2500 - 2600 rpm. Only 8000 miles.
Questions to the longer term owners - Is there an external component (AC, generator, etc.) that could be causing this? (I hope) or is it likely to be something internal? Can the balance shaft somehow get out of sync? Any ideas appreciated, although I will not be able to do anything about it until May.
Winter Solstice, Tucson AZ - '09 NA Automatic Cool Silver Coupe; DDM Supercharger, MagnaFlow cat and exhaust, ESTuned; GXP sway bars, DDM chassis kit; Stoptech brakes; Michelin PSS tires; Pioneer radio w/ NAV and b/u camera. Plate SOL N AZ
Summer Solstice, South Euclid OH - '09 NA Auto Mysterious Black Coupe; DDM Supercharger, MagnaFlow, DDM chassis kit, Hawk brake pads, Conti EC Sport tires on Black ASA wheels, Advent radio w/ NAV and b/u camera. Plate SOL 4 OH