2017 Hyundai Accent Pricing and Specs

Car makers will sometimes help out with such problems provided the car has been serviced correctly and not abused throughout its life. I agree that 40,000km is not a reasonable expectation for a modern automatic transmission, so I’d be contacting Hyundai Australia’s customer service division to see if anything can be done. Experience tells me that Hyundai takes its obligations in this area pretty seriously, so you may be offered some help with the cost of repairs.

You could also have the transmission inspected to see what went wrong (your state motoring club is a good place to start for independent inspections like this one) as this information might be very useful if you decide to take the matter further. The ACCC would be the final step in this process, and Australian Consumer Law deals with what is fit for purpose and what is not.

You don’t tell us what happened, which makes it difficult to be of help.

Reducing speed isn’t a satisfactory answer, as driving at 70 km/h when the rest of the traffic is doing 100 km/h can be dangerous. It would appear that there is nothing obviously wrong with the car, or it would have been found in the inspections. You could try increasing the tyre pressures by 5 psi and see if that has any affect; you could also have an experienced mechanic drive the car over the section of road in question so they can see how it behaves.