Do you have the check engine light on?
I have found a TSB (technical service bulletin) which may be applicable.
I have attached the first description, it is only applicable to certain vehicle VIN's
Toyota TSB 0312-17
It looks like you may be out of power-train warranty but i would still say it would be worth contacting a Toyota dealer to see if the TSB is applicable. If it is applicable you may be able to get Toyota to cover it as it is a known issue.
The repair includes replacing the torque converter and reprogramming the PCM.
If the issue is not as described in the TSB and you have a check engine light on the next stage would be to read the codes. Guide below:
Hope that helps, any further questions please do not hesitate to ask.
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Wednesday, March 27th, 2019 AT 11:40 AM