Pretty sure it’s the same

 

Just stating the obvious, but is there a reason you don't ask a Toyota dealer there ❔

 

Yes its in Australia too. I think only Atara has this problem. How did you resolve this?

 

Has anybody that has had this problem in Australia get it resolved? I've spoken to my local dealership and they are saying they have never heard of it! I explained I know about the U760 ATM ECM Software update but they are unsure if this update can happen without looking at the vehicle first.

 

They would need the VIN and scan the car's computer to see what revision level that your car is now at.

Have you considered replacing the transmission fluid? What mileage are you at?

There are thicker transmission fluids that are still rated for the Toyota WS fluid application. The common one that I've used is Castrol Transmax ATF/CVT Universal, which isn't very expensive but which will go straight to the source of the shudder at the TC clutch plate surfaces.
Note that it takes well more than the transmission's 7-quart capacity to replace even 80% of the fluid, because of the unavoidable inter-mixing of old and new fluid inside of the transmission. It helps to pull the pan to get more old fluid and wear silt out initially, as well as the old filter.