Also remember on the C6 Z51 option, this is a more complete performance package than was the C5 Z51 suspension package. The C6 package not only includes the suspension upgrades of higher rate springs, stabilizer bars, and shock valving, but also includes the lower geared 6 speed transmission, upgraded tires to the new F1 Supercar EMTs, upgraded brake rotors, transmission oil cooler and a power steering oil cooler. Great package!
I think, (I didn't look this up yet) but the only difference in the Z51 package ordered with the automatic would be of course the A4 trans VS the 6 spd. I'm certain all A4 trans get a cooler.
For everyday type driving and weekend cruising, I think the automatic with the F55 suspension would be to the liking of most softcore Vette enthusiasts, but not the hardcore drivers. Z51 would probably be better for those people.
vettepilot