I have a 2005 Grand Cherokee and it won't shift out of first gear. I can drive it up to 20-25 mph and it won't shift into second. I tried to do it manually but it won't. I've taken the shift module apart and I'm assuming that this is my problem. My check engine, abs, and brake lights are on. Does anyone have any suggestions? Do you think that it is the shift module? If it is does anyone know anywhere I can get a new one inexpensively? Thank you.....

 

I'll move this to Grand Cherokee Tech for you so you can get a better response from the GC guys here. Good luck man!

 

Well if you can get those codes read, it might help us discover what is wrong quicker.