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Odd that you asked this question today of all days. I just took the FRS into the dealer this morning. I had a break from my current tour about 4 weeks ago and took the car out for a day of serious driving.
About 10 minutes into my second run, the transmission started shifting itself from 3rd to 4th when I had not called for an upshift. In a straight line, not a huge deal. In a braking zone when you are expecting some engine braking to aid turn in, HUGE DEAL! My dealer is consulting with Toyota regarding whether this is a heat related fail safe or ecu/pm issue. If it is a heat based fail safe I have asked to question whether or not adding a quality trans cooler will effect our warranties. I'll let everyone on here know the response as soon as I get an answer.
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