I agree stay with the AO .I got the AU and lost 2 mph.plus when it now goes in regon I come to a stop and the idle stays at 1100 rpm for about 4 seconds then it will drop to an idleThe only reflash out for the C/C trucks is the AU. The AX reflash is for the regular trucks only. If you have the AO flash, KEEP IT! Everyone that has got the AU reflash has lost MPG that I know of.
I will have to disagree with you that D1 stands for C/C.The c/c designated d1 by dodge
07 auto 235ax
07 man 230ax
08 auto ap
08 man ao
You need to use a scanner to read the current #
Bob