Hey Guys, I was hoping someone could help me out with a tranny code p1870. The car is a 99 firebird 3.8L A4. The car had 44,000miles on it. I have been getting the symptoms of hard shifting, they only last until I put the car into park and back into gear. I have had it happen 4 times in the past two months. I just got the code yesterday, I checked the tranny fluid and it is topped off, looks nice and red, no burning odor. 2miles after checking the fluid level the check engine light went off?? Anyone have any ideas what could cause this? Am I doing any sort of damage if I continue driving the car? I seems to run and shift just fine now. I hope I am not looking at a rebuild...errrr