well the P708 code was a bad Trans range senor replaced it and now i have 1 and 2 manualy and it shifts better into 2nd well....it did.

about a week or 2 after doing the trans range senor i looked down to see my OD light flashing took it to the trans shop they read 1,2 shift error now when im driving sometimes not always my truck will spudder like theres a miss or somthing other times it will be fine. what causes this and the trans is still under warenty is it something internal of the trans?

thanks guy