I have an 08 Dodge 2500 with 124000 miles on it. yesterday while haul cows it shifted hard from 1st to 2nd and then would not shift out of second. The engine light came on and the jake brake would not work. I have a tuner on it and it had a code of pz87.1 not sure what that is and what is going wrong with my truck but I got to have my truck. Any suggestions or ideas ?

 

I have never heard of a PZ87 code. Neither has google....