Problems with auto tranny. Please help!

[DtS]

Hi folks.

Problems started yesterday. After flooring my car from a red-light the gear-box appeared to be stuck in second gear. After slowing down a bit (using the brakes), the third, fourth and fifth gear engaged as intended.

Same thing occured earlier this evening. After slowing down completely there was a "clunk"-noise as the first gear engaged. No problems afterwards. Gearbox worked as intended. And now recently when I was on my way home, the gear-box initially worked as it should, but after stopping at a red light, the gear-box was locked into second gear (what I believe is the limp-mode). Half a minute later the "check engine" light came on. I pulled over and stopped the car. Started it again, but the limp-mode and check engine light remained there. So now my car is in the garage with what appears to be a faulty gear-box [:(].

Anyone else had this problem. Any suggestions on what can be wrong. Any suggestions on how much it will be to fix.

Thanks in advance for any kind of feedback!