Transmission Hard shift
Hey guys i've had this sienna now for about 3 years. It has about 150k miles on it (2006).
In the last 4 months or so i've periodically been getting hard shifts ONLY from 2nd to 3rd gear. We have flushed the transmission fluid and it helped for a short time (a couple thousand miles). Now the part that i find odd is that when the car is cold it shifts fine. It actually shifted smoother more consistently in the winter than it does now.
Where should i start checking? I think i can assume that fluid is not the issue (level is correct and its relatively clean). I've read about a solenoid that could cause it but havent gotten much past that.
Thank you for your help!!