I was wondering what could cause a vibration on start up. Its for about 2 seconds and thats all it lasts. Is there a common problem that is with these cars. Also could this vibration be associated with a bad torque convertor because I think I have torque convertor shutter. I had the system flushed but they didn't change the filter. They only flushed the system. Is the filter a problem or do you think I should be fine. The filter was replaced about 2 years ago or 15000 miles. Thanks for any help