My '01 GTS does 59 mph at red line in first gear. If you have any of the alternate ratios, like 3.55, your red line speed will be noticeably lower. Try 5000 rpm in first gear. Would be around 51 mph with 3.07 and 42 mph with 3.55 ratio. Approximately. Or bang the rev limiter just for fun. Try for 59...