The build sheet says 3.23 gears, but at 60mph in D (NOT OD) I turn 2700 RPM which seems high for those gears. Tires are 245/50/16 GSC. What do you think of those revs? What gears are they likely to be?

Car seems to have a ton of low end... I just put the GSCs on today and took it out for a spin. I had some 225 yokohama snow tires on there since I bought the car last fall until today. I stopped on a paved road (not fresh smooth asphalt or anything), let the car sit at idle and pulled it into 1st. I hit the gas from idle and it ripped to redline in no time, I shifted to 2nd and it never stopped spinning until I had a patch about 30-40 yards long of twin black stripes. Maybe the GSCs just are too hard to stick well? OR is it gears?

 

could be either, when i had the Futuras on my car, they got no grip what so ever, or could be a gear change. I think i had a clutch change in my car nobody told me about

 

Put the car in the air and see how many turns of the driveshaft it takes to make one wheel revolution.

 

Sure Grip, I could do it the more accurate way... lol

I just figured since I wasn't going to do that tonight someone could shed a little light based on what they turn in comparison. I checked the gear chart at f-body.org and it shows 3.42 as turning 2700 at 60mph in 3rd

 

I'm at 1200 rpm at 44-45mph after the converter locks up.