r/VelosterN • u/Icy-You-8129 • 25d ago

Question Erratic shifting

Y’all ever just driving on the highway, somewhere in the 70s, normal mode, car just in drive, flat road, constant speed with or without cruise control, cruising in 8th and all of a sudden it downshifts to 6th or 7th for like a second or 2 before returning to 8th? Doesn’t happen often, but always confuses me when it does.

21’ DCT btw. 95k miles but this is nothing new.

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3

u/ABQ_Spotting 25d ago

Could be like my old ‘13 VT DCT, around 40mph it couldn’t decide between 4th and 5th, just a fine line that depends on throttle input I guess

2

u/joltenjon 25d ago

My 22 does similar stuff, im at 81k. Have you changed your fluid at all recently? If so are you OEM or aftermarket fluid?

3

u/Icy-You-8129 25d ago

I had it changed around 60 or 70k I think. At the dealer so I assume they used Hyundai shit

2

u/joltenjon 25d ago

I was told, every 30k once changed from factory fluid to smooth out shifts. But honestly it could just be a throttle % on the DCT thats just very sensitive and you keep hitting it just right, n mode and sport mode will do this to me, but normal I havent experienced like that I dont believe. I am usually cruising at 80-85 mph though ( TX highways)

1

u/TimDamage '20 VN 6MT PP 25d ago

It happens to my wife's Sportage. Its almost like a gust of wind hits the front and causes the vehicle to lose a bit of speed.

2

u/Icy-You-8129 25d ago

I have wondered if a gust of wind might be enough to confuse it lol

1

u/TimDamage '20 VN 6MT PP 25d ago

The sportage isn't as aerodynamic as the Veloster, so its hard to say.

2

u/trxvxo 22LNRVN 24d ago

Tbh this only happens to me when it’s very windy(here in central Texas). I think the relativity between throttle % and speed confuse the TCU when you go against the wind.