All the auto's need is a tune and they are just as fast as the 6 speed. The 9.25 comes in the Hemi not the 10's.
Correct.
The 04's came with 4.10's the 05+ came with 4.56's.
In bumper to bumper traffic gassing it hard at every take off I was getting 8.9 mpg but on the freeway cruising in 6th gear at 75-80 I was getting 18 mpg.
Stock the RC is a low to mid 13 sec truck with a good driver. With DR's it can hit 12's. The Auto can be low to mid 13's with just a tune.
I just took mine and did two 14.1 runs missing 3rd both times. In another run I was beating a buddy in a 300C but shifted into 1st instead of 3rd.He finished with a 13.7 so I think my run would have been close to 13.4-13.5 since I have a lot of top end. The DA was 3800+ that day in 90+ heat at the CA speedway.
My SRT-10 feels stronger than my Silverado and I managed a 13.7 in the Silvy. The Silvy has better take-off but the Viper has better up top.
BTW, I have my 10 for sale if you are interested.