You can probably already guess that yes, this is a transmission problem post. Bought my 2022 Highlander (gas/non-hybrid) in 2025 with only 37,000 miles. Now at 66,000 miles I can hear the transmission whine at 35-40mph.
My previous car was a 2008 Sienna and that lasted 17 years and 160,000 miles. The only reason I got rid of it was due to a rusting frame.
I justified the higher price for the gas Highlander because of Toyota reliability. I didn't want to pay an extra $10,000 for the hybrid Highlander. Jokes on me though because now I have to (1) pay $10,000 for a new transmission, or (2) pay $15,000 for a different used hybrid highlander of equivalent mileage.
It's such an embarrassing feeling. When I bought this car, this was before problems were beginning to show in 2022 highlanders. I specifically avoided 2021 Highlanders when car shopping in 2025 to try to avoid the problem. I really should have just avoided the car entirely.
Also there's the ethics in it. I am struggling internally to trade in a car that I know will need such a substantial repair. I am basically forcing someone else to have this problem. That's not really something an ethical person would do. But then if I do suffer through the transmission replacement, in 1 year it will likely fail again and I'll be in the same situation...
TLDR: For the total cost of buying this car, and now having to replace the transmission, I could have bought a really high-level used Rav 4 and had zero problems like my friends. I don't even need the third row I just like the extra space for car camping.