Automatic Transmission problems of the 2001 Mazda B4000

It has cut out on four occasions when the transmission is in neutral. Three times sitting in traffic where the driver was unaware until putting vehicle in gear to take off. The other occasion was while making a right turn with the clutch in and suddenly the power steering was gone since the truck was not running. Mazda has no idea of what problem is and expects owner to continue driving under these conditions. Has been to dealer three times for condition and examined by factory representative.