Transmission designed for 10-15 min cold start delay

[1NZYaris1]

If you are really concerned , change the oil inthe Gearbox this might help some

[Yaris Hilton]

Originally Posted by 1NZYaris1

If you are really concerned , change the oil inthe Gearbox this might help some

I wouldn't recommend that as a "shot in the dark" for a relatively new automatic Yaris. It uses a special synthetic ATF that's expensive, is very long lasting (the Yaris owner's manual actually has no recommended change schedule for this), and it requires a special procedure to do it. It's not the problem, anyway.

When I buzz up to 55 MPH with a cold engine in mine, it stays in third gear for the normal warmup as mentioned before a little bit after the "COOL" light goes out. Probably 15 seconds more at that speed. I only notice the delayed shifting when I do go up to highway speed with it cold. Around town I seldom notice it.