Hi. I have recently had transmission work done on my 05 taurus. After getting it back, my car will slip into what seems like neutral when i speed up after i turn left and then immediately go over train tracks. It does it in the same spot almost every day. Only other time i have had a problem since getting it back was while i was going 20 mph in a school zone(driving straight, no turning). Both times i was able to come to a stop and start to accelerate again and it would work fine. I took the car back to the mechanic and he drove it for a few days and could never get it to do this while he had it, but then once i got it back, i have experienced it once again almost everyday. Any advise or suggestions would be appreciated.