I'm also thinking it's a lube issue. There are apparently a bunch of us in the northeast experiencing the same thing as there's a thread running in the 86 owners of New England group on FB. I guess there's a bearing where the steering shaft goes through the firewall and some people have had it go bad and when it does there's a vibration through the floor that you feel in the pedals. I'm hoping it's something that simple although I bet that it's a bunch of labor time to replace it. This is why I got the car CPO so it has a 7/100 warranty
