American Honda Motor Company based in Torrance has extended its warranties to an estimated one-point-two million cars and minivans after reports of possible transmission failures. The Los Angeles Times reported earlier this month that American Honda had replaced almost 16-thousand automatic transmissions during the last three years. Owners of the affected vehicles had complained of erratic shifting and in some cases spontaneous downshifting into low gears at highway speeds, causing some to lose control of their cars. It was reported there were no accidents or injuries due to the transmission problems. Owners of the Honda vehicles from model years 2000 to 2003 are to be notified by mail of the extended transmission warranties lasting seven years or 100-thousand miles.