i recently picked up a 1993 740il. it sat for about 8 months or so in police impound before being auctioned off. the guy that bought it drove it home and all was good. the next morning he went out to leave and the floor was covered in coolant where the heater core busted. when he started the car to take it to be repaired it popped up trans program on the dash. the shifter will move but it wont engage any gear. It just revvs like it is in neutral no matter what gear. he paid $1000 to have the heater core replaced but the shop he chose could not figure out the trans issue. it has been reset and as sson as you put it in gear it pops up again. the fluid has been checked and is full. it does not show the gear indicator on the dash and wont show what mode is selected. trnas is extremely clean with no leaks. has anyone experienced something like this before? i have no reason not to believe what the guy told me about driving and shifting good. if it didnt i cant see him spending the money replacing the heater core. the shop says the believe the trans control(computer) is bad. some say valve body? anyone have any ideas?