corolla vibration (and cvt software upgrade)

[scat]

Hi Everyone

I have a 2013 corolla ascent sport with cvt that has a slight vibration when doing a constant speed but is most noticeable at 50km/hr.

I've taken it to my dealer twice. The first time they said it was normal. The second time they said they did a software upgrade. I have a feeling they just took it out the highway and gave it a flogging (I noticed the average fuel consumption had jumped up a lot when I got in it after they drove it.)

Either way, it still vibrates

I'd be interested if anyone knows:

1: Is there really a software upgrade for the cvt's?

2: Is a slight vibration normal at a constant speed on a smooth road. ( It's most noticeable at 50km/hr)

if it's normal, I don't mind. I just want to make sure there is nothing wrong

P.S I've had my wheel balance checked and they are fine

Thanks

[appwave]

Hi, I had an old camry and had the same incident like yours. The only difference is the vibration is more felt at speeds over 100km/hr. Took it for a few checks and eventually found out the tyres are out of shape (Yes, they can go weirdo shapes) CHanged the tyres and now is smooth as baby.

Now I recently got a 2014 year corolla hatch and it has a slight vibration during idle. The idle goes away after driving off. I suspect the engine mounting is not well designed or factory fault. Maybe those who got this model can share if they have the same story.