My owner's manual states the following recommended shift speeds: 1-2 15 mph 2-3 25 mph 3-4 40 mph 4-5 45 mph 5-6 50 mph I've only got 400 miles of seat time, but these shift speeds seem low. This is my first real muscle car and with previous cars I've used a combination of sound and RPMs to determine when to shift. My perception is to shift in the 2500-3500 RPM range which puts my shift speeds a good bit higher than the recommeded ranges. I don't even think that I've used 6th gear yet! What do you guys/gals think?