Hello All, I have a recurring problem the the F1 system in my 2008 F430. For the first fifteen minutes or so after starting up the car, everything is fine. However, after 15 minutes or so, the car will not auto downshift to 1st at a stop, it instead shifts into neutral. When this happens, the only way to get it back into gear is to turn off the car and restart it, then it goes back into gear with no issue. Also, on two separate occasions in recent months, after about 30 minutes of driving, the car has shifted itself into neutral while doing 70 mph on the highway. The first time, I spent about 15 minutes on the side of the highway trying to get it back into gear with no luck, and had it towed. The second time, I was able to get the car into gear after a 30 minute or so cooldown. Two independent shops with good reputations in my area were unable to find the issue, so the car was taken to Scottsdale Ferrari. They diagnosed a bad ediff control valve (solenoid) and diagnosis found that ediff duty cycle was %33 (%8 being acceptable limit). They replaced the control valve, and after repair, the duty cycle dropped to %7. I went and picked up the car today, and after 15 minutes or so on the drive home, same deal, shifted into neutral instead of 1st when coming to a stop.. This is incredibly frustrating, and now I'm running out of ideas.. I think (hope?) that there were two separate issues here, and that the part where I got stranded on the highway was caused by the pump shutting down as a protective measure, due to the high duty cycles with the bad solenoid. Could the second issue (shift/stuck to N at stop light) be caused by something as silly as a bad brake light switch? If so, why would I be able to get into gear after restarting the car, and why would it only happen each time after the initial 15 minutes of driving? I should add, I have already replaced the pump with the one Juri sells, as the original died while in the shop for something completely unrelated. I've also replaced the pump relay with the Scuding Swiss electronic relay. Ideas? Any feedback would be greatly appreciated, as I'm not sure where to look at this point. I do have an Xdiag Pro that I can hook up, but not sure what to look for.. I just want to be able to drive the car without worry each time if I will make it home!