a bad connection. I can be cruising, holding it in 3rd gear, and it will be very rough. Then all of a sudden it will kick in like it wasn't getting contact and accelerate smoothly. Like I said, I know of at least one out of spec. And when it's running rough, you're right, my shifter vibrates more than other times. Just wondering about the severity of the problem at certain Ohms, that's all. Getting this fixed thru a great member here in Mass... cough cough... Dave