Our local Hyundai dealer uses a exchange system for changing the ATF. This is effectively a power flush system I believe, and they also mentioned that they use "SPIII-approved synthetic ATF" instead of the OEM Hyundai or Mitsubishi SPIII ATF. Of course, the exchange system flushes the old ATF from not only the sump, but the torque converter, and cooler/lines.
I have two worries here: 1). I've been told that power flushing an automatic transmission can be harmful to the transmission, however, the Service Advisor at the Hyundai dealership told me that there is no worry . . .? and 2). I'm concerned that they're using an "SPIII- approved synthetic ATF" rather than the Hyundai spec OEM SPIII. I have no qualms or arguments, per se, against synthetic lubricants, as I use Mobil 1 for the engine. However, the "SPIII-approved" worries me.
One would think that they should know what they're doing, but you never know, as I don't want to cause a problem with a perfectly operating transmission in our 2006 Elantra. The Maintenance Schedule calls for "service service" replacement of the ATF at 30K miles or 24 months. The car is 24 months old, but only has 13K miles on the clock. It does see mostly in town, stop and go driving, which certainly qualifies as severe service. I want to adhere to not only the intent, but the letter, of Hyundai's preventive maintenance schedule, so that down the road there is absolutly no question regarding proper and timely preventive maintenance should a warranty repair question arise.
Any thoughts on this would be certainly appreciated.
Thanks, Don