got new 2010 this week. dealer had no info on trans ratio for 6sp AT. i found out the 4th gear is 1.0 while 5th is 0.7 and 6th is 0.6. or close to that. been playing with slapshift and see that it goes into 5th at 35mph or so around town. have not driven enough to see if it is adaptive shifting where you rev a lot and it tends to stay in lower gears longer. my caddy does that. gear ratio is almost identical to 6spd MT. double OD is interesting.