I have a 2004 Hyundai Tiburon GT V-6 automatic. Since purchasing this vehicle every now and then I was having trouble with it shifting hard from 2nd to 3rd gear. Sometimes the whole car would shake. I took my vehicle to my local wrench guy and he found out from Hyundai that a cold reboot & relearn procedure would fix this problem. And it does at least for me. The only thing is eventually it comes back. The fix lasted a year so I am down with that. I am going to write what he done from receipt i got from my guy.
ASAIN SCANNER $29.00
General Labor $46.88 Total price fix was $75.88
Check for slip shifting 2 to 3, check fluid level,follow TSB for 2-3 shift: Did a cold re-boot & a re-learn procedure & test drive & it shifted ok, a ECU re-flash update might be avaliable from Hyundai per the TSB
ASAIN SCANNER $29.00
General Labor $46.88 Total price fix was $75.88
Check for slip shifting 2 to 3, check fluid level,follow TSB for 2-3 shift: Did a cold re-boot & a re-learn procedure & test drive & it shifted ok, a ECU re-flash update might be avaliable from Hyundai per the TSB