Sorry, I have an 05' 300c 5.7L

I updated to r17 and my 1-2 shift turned into a dog. It now has a hesitation between shifts like it's hitting the rev limiter. Any advise?

Thanks

I have no cam and I have a really bad idle surge. The car runs great but when U stop and put it in park it jumps from 650 to 950 and back down and continues to do this. Any thoughts?