I just changed my gears from 3.08 to 4.56. My speedometer was off because I had 33 in tires on it. I thought I was going to get closer when I went to 4.56. I was wrong. When I am going what I think is about 65. It is begged and trying to go around again. What did you guys do? Is there something I can get at a gm dealer to compensate for this?