Hello, I have an issue with my automatic gear box. Very often, when I start the engine, my gear selection blinks on a dash board - all four gears (P, R, N, D) are blinking simultaneously. Although I can select 'drive' and drive (it will still blink) but while accelerating it feels slightly jerky. When I select 'rear drive' acceleration pedal doesn't work, there is only default acceleration when you release break pedal, the car moves slowly. And the most important part: when the gear selection blinks, the acceleration might not work at some point while I'm driving. It can happen in 5 km or in 200 meters from the beginning of driving. So the car slows down until it stops. After complete stop I can accelerate again and it works for some time. But if I start engine and the gear selection doesn't blink, everything is fine. The car acts normal! Except, on rare occasions 'rear gear' acts exactly the same as mentioned before. The weird thing is, when I start engine after the car was idle for a long time, the possibility of the error is low. When I stop driving, turn off engine and turn it on in 10-20 minutes it has this error in 8 cases of 10. I went to mechanic, he made a simple computer test and the system said that there is a problem with gearbox unit. He claims the system switches to a safe mode, that's why the gear box selection blinks. He told me I have to change the complete unit and it will cost me around $1800. So i have a question, is the only solution to fix this error by changing the gearbox unit?