Hyundai getz transmission problem
 

Hi,
I have a 2006 hyundai getz auto 1.6. It doesn't go from 1st gear into 2nd in the morning when cold. Engine keeps revving but no gear change. Untill i drive slowly for a couple of minutes then its fine for the rest of the day with smooth shifting. Don't know what is the issue. Please help.

Just out of curiosity , when did the trans have it's fluid and filter changed?

Trans fluid and filter changed, still the same issue, in the morning it starts well, no jerks in gears, no sound, just when put in D it doent go to 2nd just remains in 1st and keeps revving untill after couple of minutes it starts changing gears and runs smoothly the rest of the day

Problem solved
Auto transmission speed sensors were the culprit. I changed them and it goes like new,,

Thank you for the update.

Automatic transmission speed sensor
 

sorry to reply on old post. Do you have the photo of this sensor or do you remember the part code? Thank you very much