Saab 952 Transmission problems by year

As we travelled along a busy road, the transmision failed without warning adn we were unable to engage any gear, which put us some real danger as we attempted to move the car to the side of the road. We we told by the dealer that saab has known of a failure in the cnetral computer in the 9-5 model and has been replacing computers in cars even if they come in for routine maintenance. We were never informed of any problem with this car and drove it without realizing the danger it presented. The car was towed to the dealer and the computer replaced, but as of today new electrical problems have appeared and we fear the problem is not solved.*Ak