My transmission acts up again. All of the sudden it begain to jump in and out of gear. All I noticed it jumping from 1234 neutral Maybe reverse. The last time it jumped in neutral and I only had reverse. Both times it was very hot outside about 100. No engine lights. Last time I went to Transmission lab and they said fluids are clean and are right levels. At that time it was not acting up and since no codes were left they couldnt get anywhere. They thought it to be and good solid shifting transmissiion. Its scary when this happens as you are wondering if you are walking.