My 08 F350 SRW diesel has 92688 miles on it. Since April it has locked in Park three times. This has happened after going some distance (long or short) in Tow/Haul mode. After it sits for an hour or so the transmission slides into gear with no problem. When it is locked in park the brake lights do not work also. So far it is not a constant problem. My dealer cannot duplicate the problem in the shop and is at a loss as to what to do. Any ideas? Ghskas