[SethD]

2018 Elantra SEL here with 20,000 miles. When the car is cold first thing in the morning, the transmission bangs into 3rd gear as I slowly accelerate down my street. Once warmed up, the upshift to 3rd is smooth, but the downshift into 3rd is hard and I hear a clunk noise. It seems to be worst about this with slow acceleration and deceleration.

Anyone else experience this with their Elantra 6Spd automatic or know anything about this issue?

 

[12GLS3.5]

Not with an Elantra. My ex-'08 Grand Caravan w/6-spd did the same thing. I ended up taking it to a local transmission shop who in turn took it to the local Dodge dealership. They uploaded a software update into the PCM and that solved the problem.

May be worth investigating with you're Hyundai dealer. Most likely will be covered by the warranty.

 

[mclasser]

I've noticed the 6-speed can get a little confused at slower speeds and have a harsh kickdown.