I use 5th all the time in 55mph zones.
I only use 6th above 65mph. at 60mph 6th gear is around 900 to 1000 rpm and drones bad.
At 80 I sit around 1400 rpms in 6th
Drives perfect!
From what i understand my tuner mimiced the gt500 tables then made a few tweaks.
You still running the 3:55's? , I have 4:10' thinking about 4:30's to up the rpm's at crusing in OD.
Yup still have the 3.55s They seem to be working out great for the turbo.
Yup same here I love the new ratios. .74, and .50 6th ftw.My 5th is a .74 so i use it all the time. Only use 6th above 65mph