thanks for the reply- sounds good

what is the difference between the mpg booster tune and just using the stock factory tune , using 89 octane??

u7135
2010 r/t auto

I reset the tcm but no help- at first I thought I felt it downshift hard from 4 to 3 to 2 but I just drove it again and it is from 3rd to 2nd only
thanks for any help

2010 challenger r/t auto
u7135

I put the 6200 shift points in and when downshifting from 4th to 3rd and 2nd I get a loud clunk(jolt), is this normal for the 6200

thanks for reply

I have a 2010 challenger r/t auto- Inoticed you have a update on the website 9r28 dated 2/23/11- does this include the updated calid