My 2011 Santa Fe CRDI A/T 4wd probably needs overhauling. I feel the tranny slides when changing from 2nd to 3rd and 3rd to 4th gears but runs fine on 5th and 6th gears or at highway speed. Also, the car jerks when cold at stop but jerking's gone when reaches operating temperature. I have it OBD scanned but found no fault, have the tranny fluid changed and still no improvement. Any advise will be highly appreciated. maraming salamat.