that more in the seat. I have felt it through the steering wheel as well. When you take your foot off the gas you're releasing the load on it. Would be worth taking a look. Other than that, how long ago did you balance tires?
1992 Nissan Skyline GT-R Gunmetal Gray - Long Live the Z and Godzirra! - "Love cars. Love people. Love life." - Mr. K.