Driveline Vibration when cold start

[RoGCobraRV]

Seen some posts on this but none really pertain to my issue.

Have a 2020 PP1,when It's cold out or he diest drive of the day and I take it right out on the highway for 5 mins or so there is a vibration under my seat. Then it goes away and doesn't return at all til the next day or cold start/drive.Very weird! Could this be tire related,balancing issues? Or something else entirely.Have new wheels/tires on order so hopefully that does the trick but if not then what other areas could it be.Has 16k miles on it. Can't imagine the driveshaft being bad already.

I do have a catback and lower control arms but it did it before I installed those mods so it shouldn't be from them.

Anyone have a similiar issue or ideas on the cause?

Thanks

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[usgiorgi]

How cold are we talking? I see you're in FL so 50-60 degrees?

I have had this happen when it's ~10-20 degrees and I'm still on summer tires. They get rock hard when cold and only warm up after driving on them for a few minutes.

 

[Roger Blose]

Your tires are having a slight flat spot issue. I have the same issue with my 19 inch P-Zeros after the car sits for a day or two. The problem goes away once you get some highway driving and warmth in the tires.

 

[RoGCobraRV]

Yeah im in north florida,it gets into the 40s sometimes even lower, albeit unlikely now in april.

Suprising you can feel it that much through the tires but I guess when I get my new set road force balanced I'll see if that clears it up

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