Transmission Shudder problems of the 2002 Toyota RAV4

Several times during the week of June 2, 2014, my check engine light went on and off periodically. I had my mechanic check the codes, but she found nothing wrong. On June 13, 2014 I was driving n. On highway 101 near redwood city, CA. It was about 6p. M. In good weather; I was in stop-and-go commute traffic. I had slowed to a stop in the far left lane,of 5 lanes, due to slow traffic. When traffic began to move again, I accelerated and the transmission seemed to be "slipping"; I revved the engine,but there was no power going to the wheels. There were many cars behind me blowing their horns. Then the car began to "clank" and "chug" and it sounded like the transmission was grinding. I turned on my emergency flasher lights and pulled very slowly over to the shoulder across 5 lanes of traffic! I had several near accidents, but I made it to the shoulder! the car would only go very slowly, but the loud noises stopped, so I pulled off the freeway at the nearest exit (which was very close) . I would have stayed on the shoulder if the car was still "clanking" from the transmission area, but the noise had subsided. I felt that there was a serious mechanical (transmission) problem with my car. I called my daughter and asked her to drive to my location. I was going to call for a tow truck when she arrived. She arrived in about 45 minutes. I restarted the car and put it into "drive" and accelerated gently. The car sounder perfectly normal, and accelerated at a normal speed with plenty of power. We decided to try to slowly drive the car home if it continued to drive normally. We got home fine, but just as I was pulling into my parking lot, the car made loud noises again and lurched a few times as I pulled in the driveway. I had the car towed to the nearest Toyota dealer the next day. That's when I began to discover all the problems rav 4's had had with class action's&ecm failures.