2019 NP300 random vibration at speed

[Graham Croucher]

Hi,
I have just purchased a 2019 NP300 44k miles. There is vibration at speeds above 70miles like the wheels are unbalanced. Although it's not constant which it would be if the wheels where unbalanced... Any ideas?

Many thanks

 

[Old.Tony]

I'd check the drive shafts. There shouldn't be any play in them. Both front and rear.

 

[YD25Frontier]

If it's more under load, probably driveshaft. Other than that it could be wheel balance or shocks. A bad shock will allow the wheel to bounce at high speeds.