Based on the Elantra Touring TSB's there are two that might be relevant:
09-AT-002 Reset and Relerarn Adaptive Values
07-40-010 Harsh and/or delayed Upshift or Downshift
Also, agreeing with the advice above, and something you could try yourself:
ADAPTIVE LEARNING PROCEDURE:
Attach a Hi-Scan Pro* and select "Automatic Transaxle" menu, "Current Data" menuand "Trans Temp. Sensor".
Drive the vehicle until the ATF temperature is above 50°C or 122°F (adaptive learning does not occur below this temperature).
Accelerate the vehicle through several 1-2-3-4 upshifts and 4-3-2-1 downshifts at light and medium throttle openings until shift flare and shift shock no longer occur.
*I guess you might see that temperature on a scanguage, if not I guess the best you can do is make sure you warm the car up first. 09-AT-002 tells how to reset before starting this procedure, but you won't be able to do this without the diag kit.
Maybe it will help, I dom't know, I never owned an automatic.