My transmission is having issues switching from 1st to 2nd gear and same issue from 5th to 6th. What happens, (when attempting to switch from 1st to 2nd) RPMs rev up high (as though it is in Neutral) then after 2-3 sec it shifts, car jumps crazy and in like 1 sec it shifts down (to 1st - RPMs jump) then shifts to 2nd gear and from there it is fine. 3rd to 4th, to 5th is great, but 5th to 6th same issue, not as extreme, but similar. If i let go of gas when it should shift to 2nd gear, and wait like 2 sec, it will be in 2nd gear without jerking - Normal. Sometimes in Park there is this noise as though something metal is hitting another metal part, and I can feel it in car - but it goes away and only happens from time to time. Also Neutral on rare occasion works as Reverse - super rare. I did Stall test (per Hyundai procedure Bulletin 13-AT-007) - no issues. Dealer ran diagnostic - no Codes in transmission. Flushed fluid - didn't help. I drained fluid again, put new fluid in and checked ATF level per 13-AT-006 - no difference. Tested Solenoids - no problem there. What could be an issue with my transmission?? 2012 Sonata GLS 2.4L with 7k miles.