Mac
Member
Think that’s a great idea getting a Kia employee to chime in. Maybe they had a bunch of new hires on the assembly line in that mid May timeframe and their pneumatic torque wrenches were improperly set when tightening bolts, etc. I have an old 66 GTO and had a similar issue with vibration and after getting it up on the ‘rack’ at a local garage, discovered a loose bolt in the rear suspension. Tightened the bolt and the problem disappeared. I know apples to oranges but a common thread seems to be the build date. BTY we have a FWD with 2K miles almost exclusively on Interstates with no vibrations at any speed...smooth as silk.