auto transmission shifts hard when driving some of the time, mostly downhill
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2009 Hyundai Sonata Question: auto transmission shifts hard
Answer #1Bret Bodas from RepairPal Test Shop, September 08, 2010, 10:30Master
You should still be under warranty, I suggest having the Hyundai dealer look at this to see if there are any diagnostic trouble codes stored, Technical Service Bulletins related to this issue or software updates for the transmission control module.
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