A week ago while driving my 2003 x5 4.4 , miles 260 thousand miles and running strong my dash board lit up saying trans safe mode.I did a little research trying to solve the problem. I started by changing the transmission thermostat which wasn't working. Then i change the transmission cooler which also was bad .Problem is that after driving for about a hour the Xs goes back into trans safe mode. Can anyone help me with this problem. I dont have a clue